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Finding the Fourth Proportional to 71,673.76, 98,909.53 and 39,410.49

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Solution

The fourth proportional to 71,673.76, 98,909.53 and 39,410.49 is: 54,386.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,673.76 : 98,909.53 = 39,410.49 : x
  2. Step 2: Convert to fraction form
    71,673.76/98,909.53 = 39,410.49/x
  3. Step 3: Cross multiply
    71,673.76x = 98,909.53 × 39,410.49
  4. Step 4: Simplify right side
    71,673.76x = 3,898,073,042.97
  5. Step 5: Solve for x
    x = 3,898,073,042.97/71,673.76
  6. Step 6: Final answer
    x = 54,386.33

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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.