Home / 81,082.10-121,618.59-21,913.43

Finding the Fourth Proportional to 81,082.10, 121,618.59 and 21,913.43

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Solution

The fourth proportional to 81,082.10, 121,618.59 and 21,913.43 is: 32,868.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,082.10 : 121,618.59 = 21,913.43 : x
  2. Step 2: Convert to fraction form
    81,082.10/121,618.59 = 21,913.43/x
  3. Step 3: Cross multiply
    81,082.10x = 121,618.59 × 21,913.43
  4. Step 4: Simplify right side
    81,082.10x = 2,665,079,850.57
  5. Step 5: Solve for x
    x = 2,665,079,850.57/81,082.10
  6. Step 6: Final answer
    x = 32,868.91

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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.