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Finding the Fourth Proportional to 72,126.60, 108,245.68 and 47,159.88

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Solution

The fourth proportional to 72,126.60, 108,245.68 and 47,159.88 is: 70,776.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,126.60 : 108,245.68 = 47,159.88 : x
  2. Step 2: Convert to fraction form
    72,126.60/108,245.68 = 47,159.88/x
  3. Step 3: Cross multiply
    72,126.60x = 108,245.68 × 47,159.88
  4. Step 4: Simplify right side
    72,126.60x = 5,104,853,279.32
  5. Step 5: Solve for x
    x = 5,104,853,279.32/72,126.60
  6. Step 6: Final answer
    x = 70,776.29

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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.