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Finding the Fourth Proportional to 86,604.59, 129,919.95 and 36,684.90

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Solution

The fourth proportional to 86,604.59, 129,919.95 and 36,684.90 is: 55,032.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,604.59 : 129,919.95 = 36,684.90 : x
  2. Step 2: Convert to fraction form
    86,604.59/129,919.95 = 36,684.90/x
  3. Step 3: Cross multiply
    86,604.59x = 129,919.95 × 36,684.90
  4. Step 4: Simplify right side
    86,604.59x = 4,766,100,373.76
  5. Step 5: Solve for x
    x = 4,766,100,373.76/86,604.59
  6. Step 6: Final answer
    x = 55,032.88

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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.