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Finding the Fourth Proportional to 257,418.44, 386,123.51 and 79,925.62

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Solution

The fourth proportional to 257,418.44, 386,123.51 and 79,925.62 is: 119,887.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,418.44 : 386,123.51 = 79,925.62 : x
  2. Step 2: Convert to fraction form
    257,418.44/386,123.51 = 79,925.62/x
  3. Step 3: Cross multiply
    257,418.44x = 386,123.51 × 79,925.62
  4. Step 4: Simplify right side
    257,418.44x = 30,861,160,167.83
  5. Step 5: Solve for x
    x = 30,861,160,167.83/257,418.44
  6. Step 6: Final answer
    x = 119,887.14

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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.