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Finding the Fourth Proportional to 86,119.80, 129,229.91 and 36,196.05

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Solution

The fourth proportional to 86,119.80, 129,229.91 and 36,196.05 is: 54,315.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,119.80 : 129,229.91 = 36,196.05 : x
  2. Step 2: Convert to fraction form
    86,119.80/129,229.91 = 36,196.05/x
  3. Step 3: Cross multiply
    86,119.80x = 129,229.91 × 36,196.05
  4. Step 4: Simplify right side
    86,119.80x = 4,677,612,283.86
  5. Step 5: Solve for x
    x = 4,677,612,283.86/86,119.80
  6. Step 6: Final answer
    x = 54,315.18

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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.