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Finding the Fourth Proportional to 86,519.80, 129,779.70 and 36,591.94

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Solution

The fourth proportional to 86,519.80, 129,779.70 and 36,591.94 is: 54,887.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,519.80 : 129,779.70 = 36,591.94 : x
  2. Step 2: Convert to fraction form
    86,519.80/129,779.70 = 36,591.94/x
  3. Step 3: Cross multiply
    86,519.80x = 129,779.70 × 36,591.94
  4. Step 4: Simplify right side
    86,519.80x = 4,748,890,995.62
  5. Step 5: Solve for x
    x = 4,748,890,995.62/86,519.80
  6. Step 6: Final answer
    x = 54,887.91

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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.