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Finding the Fourth Proportional to 96,690.20, 145,035.30 and 67,165.70

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Solution

The fourth proportional to 96,690.20, 145,035.30 and 67,165.70 is: 100,748.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,690.20 : 145,035.30 = 67,165.70 : x
  2. Step 2: Convert to fraction form
    96,690.20/145,035.30 = 67,165.70/x
  3. Step 3: Cross multiply
    96,690.20x = 145,035.30 × 67,165.70
  4. Step 4: Simplify right side
    96,690.20x = 9,741,397,449.21
  5. Step 5: Solve for x
    x = 9,741,397,449.21/96,690.20
  6. Step 6: Final answer
    x = 100,748.55

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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.