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Finding the Fourth Proportional to 125,176.88, 172,744.09 and 74,875.88

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Solution

The fourth proportional to 125,176.88, 172,744.09 and 74,875.88 is: 103,328.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,176.88 : 172,744.09 = 74,875.88 : x
  2. Step 2: Convert to fraction form
    125,176.88/172,744.09 = 74,875.88/x
  3. Step 3: Cross multiply
    125,176.88x = 172,744.09 × 74,875.88
  4. Step 4: Simplify right side
    125,176.88x = 12,934,365,753.55
  5. Step 5: Solve for x
    x = 12,934,365,753.55/125,176.88
  6. Step 6: Final answer
    x = 103,328.71

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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.