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Finding the Fourth Proportional to 71,371.52, 98,491.36 and 39,539.72

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Solution

The fourth proportional to 71,371.52, 98,491.36 and 39,539.72 is: 54,564.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,371.52 : 98,491.36 = 39,539.72 : x
  2. Step 2: Convert to fraction form
    71,371.52/98,491.36 = 39,539.72/x
  3. Step 3: Cross multiply
    71,371.52x = 98,491.36 × 39,539.72
  4. Step 4: Simplify right side
    71,371.52x = 3,894,320,796.82
  5. Step 5: Solve for x
    x = 3,894,320,796.82/71,371.52
  6. Step 6: Final answer
    x = 54,564.07

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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.