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Finding the Fourth Proportional to 257,503.11, 386,271.65 and 89,039.73

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Solution

The fourth proportional to 257,503.11, 386,271.65 and 89,039.73 is: 133,565.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,503.11 : 386,271.65 = 89,039.73 : x
  2. Step 2: Convert to fraction form
    257,503.11/386,271.65 = 89,039.73/x
  3. Step 3: Cross multiply
    257,503.11x = 386,271.65 × 89,039.73
  4. Step 4: Simplify right side
    257,503.11x = 34,393,522,977.46
  5. Step 5: Solve for x
    x = 34,393,522,977.46/257,503.11
  6. Step 6: Final answer
    x = 133,565.47

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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.