Home / 81,370,178.10-122,055,267.15-20,785,904.10

Finding the Fourth Proportional to 81,370,178.10, 122,055,267.15 and 20,785,904.10

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Solution

The fourth proportional to 81,370,178.10, 122,055,267.15 and 20,785,904.10 is: 31,178,856.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,370,178.10 : 122,055,267.15 = 20,785,904.10 : x
  2. Step 2: Convert to fraction form
    81,370,178.10/122,055,267.15 = 20,785,904.10/x
  3. Step 3: Cross multiply
    81,370,178.10x = 122,055,267.15 × 20,785,904.10
  4. Step 4: Simplify right side
    81,370,178.10x = 2,537,029,077,879,780.50
  5. Step 5: Solve for x
    x = 2,537,029,077,879,780.50/81,370,178.10
  6. Step 6: Final answer
    x = 31,178,856.15

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.