Home / 86,722.20-129,986.10-36,793.80

Finding the Fourth Proportional to 86,722.20, 129,986.10 and 36,793.80

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Solution

The fourth proportional to 86,722.20, 129,986.10 and 36,793.80 is: 55,149.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,722.20 : 129,986.10 = 36,793.80 : x
  2. Step 2: Convert to fraction form
    86,722.20/129,986.10 = 36,793.80/x
  3. Step 3: Cross multiply
    86,722.20x = 129,986.10 × 36,793.80
  4. Step 4: Simplify right side
    86,722.20x = 4,782,682,566.18
  5. Step 5: Solve for x
    x = 4,782,682,566.18/86,722.20
  6. Step 6: Final answer
    x = 55,149.46

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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.