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Finding the Fourth Proportional to 69,092.40, 103,638.60 and 47,987.85

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Solution

The fourth proportional to 69,092.40, 103,638.60 and 47,987.85 is: 71,981.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,092.40 : 103,638.60 = 47,987.85 : x
  2. Step 2: Convert to fraction form
    69,092.40/103,638.60 = 47,987.85/x
  3. Step 3: Cross multiply
    69,092.40x = 103,638.60 × 47,987.85
  4. Step 4: Simplify right side
    69,092.40x = 4,973,393,591.01
  5. Step 5: Solve for x
    x = 4,973,393,591.01/69,092.40
  6. Step 6: Final answer
    x = 71,981.78

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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.