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Finding the Fourth Proportional to 257,988.78, 387,013.95 and 124,773.31

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Solution

The fourth proportional to 257,988.78, 387,013.95 and 124,773.31 is: 187,174.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,988.78 : 387,013.95 = 124,773.31 : x
  2. Step 2: Convert to fraction form
    257,988.78/387,013.95 = 124,773.31/x
  3. Step 3: Cross multiply
    257,988.78x = 387,013.95 × 124,773.31
  4. Step 4: Simplify right side
    257,988.78x = 48,289,013,272.67
  5. Step 5: Solve for x
    x = 48,289,013,272.67/257,988.78
  6. Step 6: Final answer
    x = 187,174.86

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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.