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Finding the Fourth Proportional to 125,164.88, 172,729.32 and 74,854.16

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Solution

The fourth proportional to 125,164.88, 172,729.32 and 74,854.16 is: 103,299.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,164.88 : 172,729.32 = 74,854.16 : x
  2. Step 2: Convert to fraction form
    125,164.88/172,729.32 = 74,854.16/x
  3. Step 3: Cross multiply
    125,164.88x = 172,729.32 × 74,854.16
  4. Step 4: Simplify right side
    125,164.88x = 12,929,508,155.97
  5. Step 5: Solve for x
    x = 12,929,508,155.97/125,164.88
  6. Step 6: Final answer
    x = 103,299.81

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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.