Home / 215,079.20-322,430.17-81,870.85

Finding the Fourth Proportional to 215,079.20, 322,430.17 and 81,870.85

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Solution

The fourth proportional to 215,079.20, 322,430.17 and 81,870.85 is: 122,734.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,079.20 : 322,430.17 = 81,870.85 : x
  2. Step 2: Convert to fraction form
    215,079.20/322,430.17 = 81,870.85/x
  3. Step 3: Cross multiply
    215,079.20x = 322,430.17 × 81,870.85
  4. Step 4: Simplify right side
    215,079.20x = 26,397,632,435.41
  5. Step 5: Solve for x
    x = 26,397,632,435.41/215,079.20
  6. Step 6: Final answer
    x = 122,734.47

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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.