Home / 81,519.85-122,279.78-70,244.65

Finding the Fourth Proportional to 81,519.85, 122,279.78 and 70,244.65

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Solution

The fourth proportional to 81,519.85, 122,279.78 and 70,244.65 is: 105,366.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,519.85 : 122,279.78 = 70,244.65 : x
  2. Step 2: Convert to fraction form
    81,519.85/122,279.78 = 70,244.65/x
  3. Step 3: Cross multiply
    81,519.85x = 122,279.78 × 70,244.65
  4. Step 4: Simplify right side
    81,519.85x = 8,589,499,996.95
  5. Step 5: Solve for x
    x = 8,589,499,996.95/81,519.85
  6. Step 6: Final answer
    x = 105,366.98

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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.