Home / 90,891.20-136,311.84-57,561.28

Finding the Fourth Proportional to 90,891.20, 136,311.84 and 57,561.28

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Solution

The fourth proportional to 90,891.20, 136,311.84 and 57,561.28 is: 86,326.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,891.20 : 136,311.84 = 57,561.28 : x
  2. Step 2: Convert to fraction form
    90,891.20/136,311.84 = 57,561.28/x
  3. Step 3: Cross multiply
    90,891.20x = 136,311.84 × 57,561.28
  4. Step 4: Simplify right side
    90,891.20x = 7,846,283,989.56
  5. Step 5: Solve for x
    x = 7,846,283,989.56/90,891.20
  6. Step 6: Final answer
    x = 86,326.11

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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.