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Finding the Fourth Proportional to 85,019.70, 127,471.88 and 47,605.52

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Solution

The fourth proportional to 85,019.70, 127,471.88 and 47,605.52 is: 71,375.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,019.70 : 127,471.88 = 47,605.52 : x
  2. Step 2: Convert to fraction form
    85,019.70/127,471.88 = 47,605.52/x
  3. Step 3: Cross multiply
    85,019.70x = 127,471.88 × 47,605.52
  4. Step 4: Simplify right side
    85,019.70x = 6,068,365,132.78
  5. Step 5: Solve for x
    x = 6,068,365,132.78/85,019.70
  6. Step 6: Final answer
    x = 71,375.99

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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.