Home / 81,741.12-122,114.76-51,920.16

Finding the Fourth Proportional to 81,741.12, 122,114.76 and 51,920.16

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Solution

The fourth proportional to 81,741.12, 122,114.76 and 51,920.16 is: 77,564.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,741.12 : 122,114.76 = 51,920.16 : x
  2. Step 2: Convert to fraction form
    81,741.12/122,114.76 = 51,920.16/x
  3. Step 3: Cross multiply
    81,741.12x = 122,114.76 × 51,920.16
  4. Step 4: Simplify right side
    81,741.12x = 6,340,217,877.56
  5. Step 5: Solve for x
    x = 6,340,217,877.56/81,741.12
  6. Step 6: Final answer
    x = 77,564.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.