Home / 86,278.92-129,449.52-30,127.30

Finding the Fourth Proportional to 86,278.92, 129,449.52 and 30,127.30

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Solution

The fourth proportional to 86,278.92, 129,449.52 and 30,127.30 is: 45,201.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,278.92 : 129,449.52 = 30,127.30 : x
  2. Step 2: Convert to fraction form
    86,278.92/129,449.52 = 30,127.30/x
  3. Step 3: Cross multiply
    86,278.92x = 129,449.52 × 30,127.30
  4. Step 4: Simplify right side
    86,278.92x = 3,899,964,523.90
  5. Step 5: Solve for x
    x = 3,899,964,523.90/86,278.92
  6. Step 6: Final answer
    x = 45,201.82

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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.