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Finding the Fourth Proportional to 231,939.70, 347,909.55 and 138,627.70

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Solution

The fourth proportional to 231,939.70, 347,909.55 and 138,627.70 is: 207,941.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,939.70 : 347,909.55 = 138,627.70 : x
  2. Step 2: Convert to fraction form
    231,939.70/347,909.55 = 138,627.70/x
  3. Step 3: Cross multiply
    231,939.70x = 347,909.55 × 138,627.70
  4. Step 4: Simplify right side
    231,939.70x = 48,229,900,724.54
  5. Step 5: Solve for x
    x = 48,229,900,724.54/231,939.70
  6. Step 6: Final answer
    x = 207,941.55

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1.5x scale

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.