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Finding the Fourth Proportional to 125,391.24, 187,941.96 and 57,781.91

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Solution

The fourth proportional to 125,391.24, 187,941.96 and 57,781.91 is: 86,606.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,391.24 : 187,941.96 = 57,781.91 : x
  2. Step 2: Convert to fraction form
    125,391.24/187,941.96 = 57,781.91/x
  3. Step 3: Cross multiply
    125,391.24x = 187,941.96 × 57,781.91
  4. Step 4: Simplify right side
    125,391.24x = 10,859,645,887.80
  5. Step 5: Solve for x
    x = 10,859,645,887.80/125,391.24
  6. Step 6: Final answer
    x = 86,606.10

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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.