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Finding the Fourth Proportional to 47,387.70, 71,187.15 and 39,611.70

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Solution

The fourth proportional to 47,387.70, 71,187.15 and 39,611.70 is: 59,505.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,387.70 : 71,187.15 = 39,611.70 : x
  2. Step 2: Convert to fraction form
    47,387.70/71,187.15 = 39,611.70/x
  3. Step 3: Cross multiply
    47,387.70x = 71,187.15 × 39,611.70
  4. Step 4: Simplify right side
    47,387.70x = 2,819,844,029.66
  5. Step 5: Solve for x
    x = 2,819,844,029.66/47,387.70
  6. Step 6: Final answer
    x = 59,505.82

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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.