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Finding the Fourth Proportional to 71,505.93, 98,678.03 and 39,679.41

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Solution

The fourth proportional to 71,505.93, 98,678.03 and 39,679.41 is: 54,757.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,505.93 : 98,678.03 = 39,679.41 : x
  2. Step 2: Convert to fraction form
    71,505.93/98,678.03 = 39,679.41/x
  3. Step 3: Cross multiply
    71,505.93x = 98,678.03 × 39,679.41
  4. Step 4: Simplify right side
    71,505.93x = 3,915,485,811.97
  5. Step 5: Solve for x
    x = 3,915,485,811.97/71,505.93
  6. Step 6: Final answer
    x = 54,757.50

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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.