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Finding the Fourth Proportional to 61,147.40, 91,721.10 and 43,432.70

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Solution

The fourth proportional to 61,147.40, 91,721.10 and 43,432.70 is: 65,149.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,147.40 : 91,721.10 = 43,432.70 : x
  2. Step 2: Convert to fraction form
    61,147.40/91,721.10 = 43,432.70/x
  3. Step 3: Cross multiply
    61,147.40x = 91,721.10 × 43,432.70
  4. Step 4: Simplify right side
    61,147.40x = 3,983,695,019.97
  5. Step 5: Solve for x
    x = 3,983,695,019.97/61,147.40
  6. Step 6: Final answer
    x = 65,149.05

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Similar ratio
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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.