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Finding the Fourth Proportional to 71,679.72, 98,909.38 and 39,844.52

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Solution

The fourth proportional to 71,679.72, 98,909.38 and 39,844.52 is: 54,980.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,679.72 : 98,909.38 = 39,844.52 : x
  2. Step 2: Convert to fraction form
    71,679.72/98,909.38 = 39,844.52/x
  3. Step 3: Cross multiply
    71,679.72x = 98,909.38 × 39,844.52
  4. Step 4: Simplify right side
    71,679.72x = 3,940,996,769.60
  5. Step 5: Solve for x
    x = 3,940,996,769.60/71,679.72
  6. Step 6: Final answer
    x = 54,980.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.