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Finding the Fourth Proportional to 120,166.55, 180,248.65 and 84,480.65

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Solution

The fourth proportional to 120,166.55, 180,248.65 and 84,480.65 is: 126,720.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,166.55 : 180,248.65 = 84,480.65 : x
  2. Step 2: Convert to fraction form
    120,166.55/180,248.65 = 84,480.65/x
  3. Step 3: Cross multiply
    120,166.55x = 180,248.65 × 84,480.65
  4. Step 4: Simplify right side
    120,166.55x = 15,227,522,001.18
  5. Step 5: Solve for x
    x = 15,227,522,001.18/120,166.55
  6. Step 6: Final answer
    x = 126,720.14

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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.