Home / 78,079.40-117,105.82-28,149.56

Finding the Fourth Proportional to 78,079.40, 117,105.82 and 28,149.56

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Solution

The fourth proportional to 78,079.40, 117,105.82 and 28,149.56 is: 42,219.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,079.40 : 117,105.82 = 28,149.56 : x
  2. Step 2: Convert to fraction form
    78,079.40/117,105.82 = 28,149.56/x
  3. Step 3: Cross multiply
    78,079.40x = 117,105.82 × 28,149.56
  4. Step 4: Simplify right side
    78,079.40x = 3,296,477,306.44
  5. Step 5: Solve for x
    x = 3,296,477,306.44/78,079.40
  6. Step 6: Final answer
    x = 42,219.55

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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.