Home / 81,979.30-122,990.55-29,383.30

Finding the Fourth Proportional to 81,979.30, 122,990.55 and 29,383.30

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Solution

The fourth proportional to 81,979.30, 122,990.55 and 29,383.30 is: 44,082.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,979.30 : 122,990.55 = 29,383.30 : x
  2. Step 2: Convert to fraction form
    81,979.30/122,990.55 = 29,383.30/x
  3. Step 3: Cross multiply
    81,979.30x = 122,990.55 × 29,383.30
  4. Step 4: Simplify right side
    81,979.30x = 3,613,868,227.82
  5. Step 5: Solve for x
    x = 3,613,868,227.82/81,979.30
  6. Step 6: Final answer
    x = 44,082.69

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1.5x scale

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.