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Finding the Fourth Proportional to 75,630.70, 113,446.05 and 72,001.90

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Solution

The fourth proportional to 75,630.70, 113,446.05 and 72,001.90 is: 108,002.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,630.70 : 113,446.05 = 72,001.90 : x
  2. Step 2: Convert to fraction form
    75,630.70/113,446.05 = 72,001.90/x
  3. Step 3: Cross multiply
    75,630.70x = 113,446.05 × 72,001.90
  4. Step 4: Simplify right side
    75,630.70x = 8,168,331,147.50
  5. Step 5: Solve for x
    x = 8,168,331,147.50/75,630.70
  6. Step 6: Final answer
    x = 108,002.85

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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.