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Finding the Fourth Proportional to 257,372.70, 386,110.08 and 79,872.15

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Solution

The fourth proportional to 257,372.70, 386,110.08 and 79,872.15 is: 119,824.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,372.70 : 386,110.08 = 79,872.15 : x
  2. Step 2: Convert to fraction form
    257,372.70/386,110.08 = 79,872.15/x
  3. Step 3: Cross multiply
    257,372.70x = 386,110.08 × 79,872.15
  4. Step 4: Simplify right side
    257,372.70x = 30,839,442,226.27
  5. Step 5: Solve for x
    x = 30,839,442,226.27/257,372.70
  6. Step 6: Final answer
    x = 119,824.06

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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.