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Finding the Fourth Proportional to 257,379.87, 386,121.42 and 88,906.35

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Solution

The fourth proportional to 257,379.87, 386,121.42 and 88,906.35 is: 133,377.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,379.87 : 386,121.42 = 88,906.35 : x
  2. Step 2: Convert to fraction form
    257,379.87/386,121.42 = 88,906.35/x
  3. Step 3: Cross multiply
    257,379.87x = 386,121.42 × 88,906.35
  4. Step 4: Simplify right side
    257,379.87x = 34,328,646,109.02
  5. Step 5: Solve for x
    x = 34,328,646,109.02/257,379.87
  6. Step 6: Final answer
    x = 133,377.35

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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.