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Finding the Fourth Proportional to 84,080.87, 126,117.66 and 20,899.65

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Solution

The fourth proportional to 84,080.87, 126,117.66 and 20,899.65 is: 31,348.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,080.87 : 126,117.66 = 20,899.65 : x
  2. Step 2: Convert to fraction form
    84,080.87/126,117.66 = 20,899.65/x
  3. Step 3: Cross multiply
    84,080.87x = 126,117.66 × 20,899.65
  4. Step 4: Simplify right side
    84,080.87x = 2,635,815,189.74
  5. Step 5: Solve for x
    x = 2,635,815,189.74/84,080.87
  6. Step 6: Final answer
    x = 31,348.57

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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.