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Finding the Fourth Proportional to 71,693.95, 98,937.13 and 39,862.57

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Solution

The fourth proportional to 71,693.95, 98,937.13 and 39,862.57 is: 55,010.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,693.95 : 98,937.13 = 39,862.57 : x
  2. Step 2: Convert to fraction form
    71,693.95/98,937.13 = 39,862.57/x
  3. Step 3: Cross multiply
    71,693.95x = 98,937.13 × 39,862.57
  4. Step 4: Simplify right side
    71,693.95x = 3,943,888,270.22
  5. Step 5: Solve for x
    x = 3,943,888,270.22/71,693.95
  6. Step 6: Final answer
    x = 55,010.06

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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.