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Finding the Fourth Proportional to 72,591.72, 100,159.04 and 42,359.78

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Solution

The fourth proportional to 72,591.72, 100,159.04 and 42,359.78 is: 58,446.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,591.72 : 100,159.04 = 42,359.78 : x
  2. Step 2: Convert to fraction form
    72,591.72/100,159.04 = 42,359.78/x
  3. Step 3: Cross multiply
    72,591.72x = 100,159.04 × 42,359.78
  4. Step 4: Simplify right side
    72,591.72x = 4,242,715,255.71
  5. Step 5: Solve for x
    x = 4,242,715,255.71/72,591.72
  6. Step 6: Final answer
    x = 58,446.27

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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.