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Finding the Fourth Proportional to 71,693.40, 98,937.54 and 39,861.48

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Solution

The fourth proportional to 71,693.40, 98,937.54 and 39,861.48 is: 55,009.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,693.40 : 98,937.54 = 39,861.48 : x
  2. Step 2: Convert to fraction form
    71,693.40/98,937.54 = 39,861.48/x
  3. Step 3: Cross multiply
    71,693.40x = 98,937.54 × 39,861.48
  4. Step 4: Simplify right side
    71,693.40x = 3,943,796,771.96
  5. Step 5: Solve for x
    x = 3,943,796,771.96/71,693.40
  6. Step 6: Final answer
    x = 55,009.20

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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.