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Finding the Fourth Proportional to 125,178.39, 172,746.15 and 74,877.39

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Solution

The fourth proportional to 125,178.39, 172,746.15 and 74,877.39 is: 103,330.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,178.39 : 172,746.15 = 74,877.39 : x
  2. Step 2: Convert to fraction form
    125,178.39/172,746.15 = 74,877.39/x
  3. Step 3: Cross multiply
    125,178.39x = 172,746.15 × 74,877.39
  4. Step 4: Simplify right side
    125,178.39x = 12,934,780,844.55
  5. Step 5: Solve for x
    x = 12,934,780,844.55/125,178.39
  6. Step 6: Final answer
    x = 103,330.78

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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.