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Finding the Fourth Proportional to 125,343.13, 187,921.19 and 75,411.53

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Solution

The fourth proportional to 125,343.13, 187,921.19 and 75,411.53 is: 113,061.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,343.13 : 187,921.19 = 75,411.53 : x
  2. Step 2: Convert to fraction form
    125,343.13/187,921.19 = 75,411.53/x
  3. Step 3: Cross multiply
    125,343.13x = 187,921.19 × 75,411.53
  4. Step 4: Simplify right side
    125,343.13x = 14,171,423,140.66
  5. Step 5: Solve for x
    x = 14,171,423,140.66/125,343.13
  6. Step 6: Final answer
    x = 113,061.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.