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Finding the Fourth Proportional to 121,358.43, 181,894.64 and 54,720.54

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Solution

The fourth proportional to 121,358.43, 181,894.64 and 54,720.54 is: 82,016.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,358.43 : 181,894.64 = 54,720.54 : x
  2. Step 2: Convert to fraction form
    121,358.43/181,894.64 = 54,720.54/x
  3. Step 3: Cross multiply
    121,358.43x = 181,894.64 × 54,720.54
  4. Step 4: Simplify right side
    121,358.43x = 9,953,372,650.30
  5. Step 5: Solve for x
    x = 9,953,372,650.30/121,358.43
  6. Step 6: Final answer
    x = 82,016.33

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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.