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Finding the Fourth Proportional to 86,632.80, 129,997.80 and 36,704.40

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Solution

The fourth proportional to 86,632.80, 129,997.80 and 36,704.40 is: 55,077.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,632.80 : 129,997.80 = 36,704.40 : x
  2. Step 2: Convert to fraction form
    86,632.80/129,997.80 = 36,704.40/x
  3. Step 3: Cross multiply
    86,632.80x = 129,997.80 × 36,704.40
  4. Step 4: Simplify right side
    86,632.80x = 4,771,491,250.32
  5. Step 5: Solve for x
    x = 4,771,491,250.32/86,632.80
  6. Step 6: Final answer
    x = 55,077.19

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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.