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Finding the Fourth Proportional to 121,082.92, 181,622.55 and 54,476.01

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Solution

The fourth proportional to 121,082.92, 181,622.55 and 54,476.01 is: 81,713.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,082.92 : 181,622.55 = 54,476.01 : x
  2. Step 2: Convert to fraction form
    121,082.92/181,622.55 = 54,476.01/x
  3. Step 3: Cross multiply
    121,082.92x = 181,622.55 × 54,476.01
  4. Step 4: Simplify right side
    121,082.92x = 9,894,071,850.03
  5. Step 5: Solve for x
    x = 9,894,071,850.03/121,082.92
  6. Step 6: Final answer
    x = 81,713.19

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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.