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Finding the Fourth Proportional to 71,473.09, 98,635.98 and 39,639.82

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Solution

The fourth proportional to 71,473.09, 98,635.98 and 39,639.82 is: 54,704.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,473.09 : 98,635.98 = 39,639.82 : x
  2. Step 2: Convert to fraction form
    71,473.09/98,635.98 = 39,639.82/x
  3. Step 3: Cross multiply
    71,473.09x = 98,635.98 × 39,639.82
  4. Step 4: Simplify right side
    71,473.09x = 3,909,912,492.72
  5. Step 5: Solve for x
    x = 3,909,912,492.72/71,473.09
  6. Step 6: Final answer
    x = 54,704.68

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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.