Home / 86,279.68-129,419.61-27,120.52

Finding the Fourth Proportional to 86,279.68, 129,419.61 and 27,120.52

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Solution

The fourth proportional to 86,279.68, 129,419.61 and 27,120.52 is: 40,680.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,279.68 : 129,419.61 = 27,120.52 : x
  2. Step 2: Convert to fraction form
    86,279.68/129,419.61 = 27,120.52/x
  3. Step 3: Cross multiply
    86,279.68x = 129,419.61 × 27,120.52
  4. Step 4: Simplify right side
    86,279.68x = 3,509,927,121.40
  5. Step 5: Solve for x
    x = 3,509,927,121.40/86,279.68
  6. Step 6: Final answer
    x = 40,680.81

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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.