Home / 80,879.32-121,387.14-34,165.72

Finding the Fourth Proportional to 80,879.32, 121,387.14 and 34,165.72

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Solution

The fourth proportional to 80,879.32, 121,387.14 and 34,165.72 is: 51,277.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,879.32 : 121,387.14 = 34,165.72 : x
  2. Step 2: Convert to fraction form
    80,879.32/121,387.14 = 34,165.72/x
  3. Step 3: Cross multiply
    80,879.32x = 121,387.14 × 34,165.72
  4. Step 4: Simplify right side
    80,879.32x = 4,147,279,036.84
  5. Step 5: Solve for x
    x = 4,147,279,036.84/80,879.32
  6. Step 6: Final answer
    x = 51,277.37

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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.