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Finding the Fourth Proportional to 79,649.43, 109,915.47 and 43,839.15

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Solution

The fourth proportional to 79,649.43, 109,915.47 and 43,839.15 is: 60,497.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,649.43 : 109,915.47 = 43,839.15 : x
  2. Step 2: Convert to fraction form
    79,649.43/109,915.47 = 43,839.15/x
  3. Step 3: Cross multiply
    79,649.43x = 109,915.47 × 43,839.15
  4. Step 4: Simplify right side
    79,649.43x = 4,818,600,776.65
  5. Step 5: Solve for x
    x = 4,818,600,776.65/79,649.43
  6. Step 6: Final answer
    x = 60,497.62

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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.