Home / 86,279.75-129,247.31-68,540.45

Finding the Fourth Proportional to 86,279.75, 129,247.31 and 68,540.45

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Solution

The fourth proportional to 86,279.75, 129,247.31 and 68,540.45 is: 102,673.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,279.75 : 129,247.31 = 68,540.45 : x
  2. Step 2: Convert to fraction form
    86,279.75/129,247.31 = 68,540.45/x
  3. Step 3: Cross multiply
    86,279.75x = 129,247.31 × 68,540.45
  4. Step 4: Simplify right side
    86,279.75x = 8,858,668,313.80
  5. Step 5: Solve for x
    x = 8,858,668,313.80/86,279.75
  6. Step 6: Final answer
    x = 102,673.78

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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.