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Finding the Fourth Proportional to 71,740.34, 98,942.71 and 63,679.88

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Solution

The fourth proportional to 71,740.34, 98,942.71 and 63,679.88 is: 87,825.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,740.34 : 98,942.71 = 63,679.88 : x
  2. Step 2: Convert to fraction form
    71,740.34/98,942.71 = 63,679.88/x
  3. Step 3: Cross multiply
    71,740.34x = 98,942.71 × 63,679.88
  4. Step 4: Simplify right side
    71,740.34x = 6,300,659,245.76
  5. Step 5: Solve for x
    x = 6,300,659,245.76/71,740.34
  6. Step 6: Final answer
    x = 87,825.90

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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.