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Finding the Fourth Proportional to 78,632.28, 117,949.32 and 43,793.28

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Solution

The fourth proportional to 78,632.28, 117,949.32 and 43,793.28 is: 65,690.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,632.28 : 117,949.32 = 43,793.28 : x
  2. Step 2: Convert to fraction form
    78,632.28/117,949.32 = 43,793.28/x
  3. Step 3: Cross multiply
    78,632.28x = 117,949.32 × 43,793.28
  4. Step 4: Simplify right side
    78,632.28x = 5,165,387,596.57
  5. Step 5: Solve for x
    x = 5,165,387,596.57/78,632.28
  6. Step 6: Final answer
    x = 65,690.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.