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Finding the Fourth Proportional to 66,301.20, 99,451.80 and 65,207.70

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Solution

The fourth proportional to 66,301.20, 99,451.80 and 65,207.70 is: 97,811.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,301.20 : 99,451.80 = 65,207.70 : x
  2. Step 2: Convert to fraction form
    66,301.20/99,451.80 = 65,207.70/x
  3. Step 3: Cross multiply
    66,301.20x = 99,451.80 × 65,207.70
  4. Step 4: Simplify right side
    66,301.20x = 6,485,023,138.86
  5. Step 5: Solve for x
    x = 6,485,023,138.86/66,301.20
  6. Step 6: Final answer
    x = 97,811.55

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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.