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Finding the Fourth Proportional to 250,715.20, 375,719.20 and 138,445.96

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Solution

The fourth proportional to 250,715.20, 375,719.20 and 138,445.96 is: 207,473.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    250,715.20 : 375,719.20 = 138,445.96 : x
  2. Step 2: Convert to fraction form
    250,715.20/375,719.20 = 138,445.96/x
  3. Step 3: Cross multiply
    250,715.20x = 375,719.20 × 138,445.96
  4. Step 4: Simplify right side
    250,715.20x = 52,016,805,334.43
  5. Step 5: Solve for x
    x = 52,016,805,334.43/250,715.20
  6. Step 6: Final answer
    x = 207,473.68

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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.