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Finding the Fourth Proportional to 85,171.22, 127,869.87 and 72,770.93

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Solution

The fourth proportional to 85,171.22, 127,869.87 and 72,770.93 is: 109,252.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,171.22 : 127,869.87 = 72,770.93 : x
  2. Step 2: Convert to fraction form
    85,171.22/127,869.87 = 72,770.93/x
  3. Step 3: Cross multiply
    85,171.22x = 127,869.87 × 72,770.93
  4. Step 4: Simplify right side
    85,171.22x = 9,305,209,358.88
  5. Step 5: Solve for x
    x = 9,305,209,358.88/85,171.22
  6. Step 6: Final answer
    x = 109,252.98

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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.