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Finding the Fourth Proportional to 316,136.76, 474,140.34 and 138,545.88

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Solution

The fourth proportional to 316,136.76, 474,140.34 and 138,545.88 is: 207,790.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,136.76 : 474,140.34 = 138,545.88 : x
  2. Step 2: Convert to fraction form
    316,136.76/474,140.34 = 138,545.88/x
  3. Step 3: Cross multiply
    316,136.76x = 474,140.34 × 138,545.88
  4. Step 4: Simplify right side
    316,136.76x = 65,690,190,648.80
  5. Step 5: Solve for x
    x = 65,690,190,648.80/316,136.76
  6. Step 6: Final answer
    x = 207,790.42

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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.