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Finding the Fourth Proportional to 257,376.87, 386,116.92 and 88,903.35

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Solution

The fourth proportional to 257,376.87, 386,116.92 and 88,903.35 is: 133,372.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,376.87 : 386,116.92 = 88,903.35 : x
  2. Step 2: Convert to fraction form
    257,376.87/386,116.92 = 88,903.35/x
  3. Step 3: Cross multiply
    257,376.87x = 386,116.92 × 88,903.35
  4. Step 4: Simplify right side
    257,376.87x = 34,327,087,679.68
  5. Step 5: Solve for x
    x = 34,327,087,679.68/257,376.87
  6. Step 6: Final answer
    x = 133,372.85

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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.