Home / 128,144.16-176,839.08-71,555.52

Finding the Fourth Proportional to 128,144.16, 176,839.08 and 71,555.52

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Solution

The fourth proportional to 128,144.16, 176,839.08 and 71,555.52 is: 98,746.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,144.16 : 176,839.08 = 71,555.52 : x
  2. Step 2: Convert to fraction form
    128,144.16/176,839.08 = 71,555.52/x
  3. Step 3: Cross multiply
    128,144.16x = 176,839.08 × 71,555.52
  4. Step 4: Simplify right side
    128,144.16x = 12,653,812,325.72
  5. Step 5: Solve for x
    x = 12,653,812,325.72/128,144.16
  6. Step 6: Final answer
    x = 98,746.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.