Home / 80,961.52-121,359.12-31,028.08

Finding the Fourth Proportional to 80,961.52, 121,359.12 and 31,028.08

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Solution

The fourth proportional to 80,961.52, 121,359.12 and 31,028.08 is: 46,510.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,961.52 : 121,359.12 = 31,028.08 : x
  2. Step 2: Convert to fraction form
    80,961.52/121,359.12 = 31,028.08/x
  3. Step 3: Cross multiply
    80,961.52x = 121,359.12 × 31,028.08
  4. Step 4: Simplify right side
    80,961.52x = 3,765,540,484.09
  5. Step 5: Solve for x
    x = 3,765,540,484.09/80,961.52
  6. Step 6: Final answer
    x = 46,510.25

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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.