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Finding the Fourth Proportional to 71,239.88, 98,760.60 and 67,447.86

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Solution

The fourth proportional to 71,239.88, 98,760.60 and 67,447.86 is: 93,503.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,239.88 : 98,760.60 = 67,447.86 : x
  2. Step 2: Convert to fraction form
    71,239.88/98,760.60 = 67,447.86/x
  3. Step 3: Cross multiply
    71,239.88x = 98,760.60 × 67,447.86
  4. Step 4: Simplify right side
    71,239.88x = 6,661,191,122.32
  5. Step 5: Solve for x
    x = 6,661,191,122.32/71,239.88
  6. Step 6: Final answer
    x = 93,503.68

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.