Home / 80,627.72-120,963.36-28,040.12

Finding the Fourth Proportional to 80,627.72, 120,963.36 and 28,040.12

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Solution

The fourth proportional to 80,627.72, 120,963.36 and 28,040.12 is: 42,067.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,627.72 : 120,963.36 = 28,040.12 : x
  2. Step 2: Convert to fraction form
    80,627.72/120,963.36 = 28,040.12/x
  3. Step 3: Cross multiply
    80,627.72x = 120,963.36 × 28,040.12
  4. Step 4: Simplify right side
    80,627.72x = 3,391,827,130.00
  5. Step 5: Solve for x
    x = 3,391,827,130.00/80,627.72
  6. Step 6: Final answer
    x = 42,067.75

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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.