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Finding the Fourth Proportional to 71,693.58, 98,936.91 and 39,862.50

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Solution

The fourth proportional to 71,693.58, 98,936.91 and 39,862.50 is: 55,010.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,693.58 : 98,936.91 = 39,862.50 : x
  2. Step 2: Convert to fraction form
    71,693.58/98,936.91 = 39,862.50/x
  3. Step 3: Cross multiply
    71,693.58x = 98,936.91 × 39,862.50
  4. Step 4: Simplify right side
    71,693.58x = 3,943,872,574.88
  5. Step 5: Solve for x
    x = 3,943,872,574.88/71,693.58
  6. Step 6: Final answer
    x = 55,010.12

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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.