Home / 80,911.20-111,705.30-71,933.85

Finding the Fourth Proportional to 80,911.20, 111,705.30 and 71,933.85

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Solution

The fourth proportional to 80,911.20, 111,705.30 and 71,933.85 is: 99,311.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,911.20 : 111,705.30 = 71,933.85 : x
  2. Step 2: Convert to fraction form
    80,911.20/111,705.30 = 71,933.85/x
  3. Step 3: Cross multiply
    80,911.20x = 111,705.30 × 71,933.85
  4. Step 4: Simplify right side
    80,911.20x = 8,035,392,393.83
  5. Step 5: Solve for x
    x = 8,035,392,393.83/80,911.20
  6. Step 6: Final answer
    x = 99,311.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.