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Finding the Fourth Proportional to 78,251.70, 117,177.15 and 43,152.42

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Solution

The fourth proportional to 78,251.70, 117,177.15 and 43,152.42 is: 64,618.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,251.70 : 117,177.15 = 43,152.42 : x
  2. Step 2: Convert to fraction form
    78,251.70/117,177.15 = 43,152.42/x
  3. Step 3: Cross multiply
    78,251.70x = 117,177.15 × 43,152.42
  4. Step 4: Simplify right side
    78,251.70x = 5,056,477,591.20
  5. Step 5: Solve for x
    x = 5,056,477,591.20/78,251.70
  6. Step 6: Final answer
    x = 64,618.12

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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.