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Finding the Fourth Proportional to 71,693.65, 98,937.89 and 39,861.73

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Solution

The fourth proportional to 71,693.65, 98,937.89 and 39,861.73 is: 55,009.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,693.65 : 98,937.89 = 39,861.73 : x
  2. Step 2: Convert to fraction form
    71,693.65/98,937.89 = 39,861.73/x
  3. Step 3: Cross multiply
    71,693.65x = 98,937.89 × 39,861.73
  4. Step 4: Simplify right side
    71,693.65x = 3,943,835,457.95
  5. Step 5: Solve for x
    x = 3,943,835,457.95/71,693.65
  6. Step 6: Final answer
    x = 55,009.55

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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.