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Finding the Fourth Proportional to 71,718.86, 98,964.44 and 39,882.62

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Solution

The fourth proportional to 71,718.86, 98,964.44 and 39,882.62 is: 55,033.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,718.86 : 98,964.44 = 39,882.62 : x
  2. Step 2: Convert to fraction form
    71,718.86/98,964.44 = 39,882.62/x
  3. Step 3: Cross multiply
    71,718.86x = 98,964.44 × 39,882.62
  4. Step 4: Simplify right side
    71,718.86x = 3,946,961,154.03
  5. Step 5: Solve for x
    x = 3,946,961,154.03/71,718.86
  6. Step 6: Final answer
    x = 55,033.80

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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.