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Finding the Fourth Proportional to 67,157.43, 100,945.32 and 42,356.85

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Solution

The fourth proportional to 67,157.43, 100,945.32 and 42,356.85 is: 63,667.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,157.43 : 100,945.32 = 42,356.85 : x
  2. Step 2: Convert to fraction form
    67,157.43/100,945.32 = 42,356.85/x
  3. Step 3: Cross multiply
    67,157.43x = 100,945.32 × 42,356.85
  4. Step 4: Simplify right side
    67,157.43x = 4,275,725,777.44
  5. Step 5: Solve for x
    x = 4,275,725,777.44/67,157.43
  6. Step 6: Final answer
    x = 63,667.20

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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.