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Finding the Fourth Proportional to 87,309.80, 130,770.30 and 75,645.80

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Solution

The fourth proportional to 87,309.80, 130,770.30 and 75,645.80 is: 113,300.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,309.80 : 130,770.30 = 75,645.80 : x
  2. Step 2: Convert to fraction form
    87,309.80/130,770.30 = 75,645.80/x
  3. Step 3: Cross multiply
    87,309.80x = 130,770.30 × 75,645.80
  4. Step 4: Simplify right side
    87,309.80x = 9,892,223,959.74
  5. Step 5: Solve for x
    x = 9,892,223,959.74/87,309.80
  6. Step 6: Final answer
    x = 113,300.27

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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.