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Finding the Fourth Proportional to 79,668, 109,949.16 and 43,865.28

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Solution

The fourth proportional to 79,668, 109,949.16 and 43,865.28 is: 60,538.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,668 : 109,949.16 = 43,865.28 : x
  2. Step 2: Convert to fraction form
    79,668/109,949.16 = 43,865.28/x
  3. Step 3: Cross multiply
    79,668x = 109,949.16 × 43,865.28
  4. Step 4: Simplify right side
    79,668x = 4,822,950,689.16
  5. Step 5: Solve for x
    x = 4,822,950,689.16/79,668
  6. Step 6: Final answer
    x = 60,538.12

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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.