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Finding the Fourth Proportional to 120,040.64, 179,736.96 and 80,512.64

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Solution

The fourth proportional to 120,040.64, 179,736.96 and 80,512.64 is: 120,551.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,040.64 : 179,736.96 = 80,512.64 : x
  2. Step 2: Convert to fraction form
    120,040.64/179,736.96 = 80,512.64/x
  3. Step 3: Cross multiply
    120,040.64x = 179,736.96 × 80,512.64
  4. Step 4: Simplify right side
    120,040.64x = 14,471,097,155.17
  5. Step 5: Solve for x
    x = 14,471,097,155.17/120,040.64
  6. Step 6: Final answer
    x = 120,551.65

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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.