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Finding the Fourth Proportional to 120,881.63, 166,747.15 and 75,480.79

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Solution

The fourth proportional to 120,881.63, 166,747.15 and 75,480.79 is: 104,120.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,881.63 : 166,747.15 = 75,480.79 : x
  2. Step 2: Convert to fraction form
    120,881.63/166,747.15 = 75,480.79/x
  3. Step 3: Cross multiply
    120,881.63x = 166,747.15 × 75,480.79
  4. Step 4: Simplify right side
    120,881.63x = 12,586,206,612.25
  5. Step 5: Solve for x
    x = 12,586,206,612.25/120,881.63
  6. Step 6: Final answer
    x = 104,120.09

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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.