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Finding the Fourth Proportional to 71,506.79, 98,679.36 and 39,675.92

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Solution

The fourth proportional to 71,506.79, 98,679.36 and 39,675.92 is: 54,752.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,506.79 : 98,679.36 = 39,675.92 : x
  2. Step 2: Convert to fraction form
    71,506.79/98,679.36 = 39,675.92/x
  3. Step 3: Cross multiply
    71,506.79x = 98,679.36 × 39,675.92
  4. Step 4: Simplify right side
    71,506.79x = 3,915,193,899.61
  5. Step 5: Solve for x
    x = 3,915,193,899.61/71,506.79
  6. Step 6: Final answer
    x = 54,752.76

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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.