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Finding the Fourth Proportional to 120,721.80, 166,557.42 and 69,727.80

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Solution

The fourth proportional to 120,721.80, 166,557.42 and 69,727.80 is: 96,202.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,721.80 : 166,557.42 = 69,727.80 : x
  2. Step 2: Convert to fraction form
    120,721.80/166,557.42 = 69,727.80/x
  3. Step 3: Cross multiply
    120,721.80x = 166,557.42 × 69,727.80
  4. Step 4: Simplify right side
    120,721.80x = 11,613,682,470.28
  5. Step 5: Solve for x
    x = 11,613,682,470.28/120,721.80
  6. Step 6: Final answer
    x = 96,202.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.