Home / 80,913.80-121,370.70-72,360.20

Finding the Fourth Proportional to 80,913.80, 121,370.70 and 72,360.20

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Solution

The fourth proportional to 80,913.80, 121,370.70 and 72,360.20 is: 108,540.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,913.80 : 121,370.70 = 72,360.20 : x
  2. Step 2: Convert to fraction form
    80,913.80/121,370.70 = 72,360.20/x
  3. Step 3: Cross multiply
    80,913.80x = 121,370.70 × 72,360.20
  4. Step 4: Simplify right side
    80,913.80x = 8,782,408,126.14
  5. Step 5: Solve for x
    x = 8,782,408,126.14/80,913.80
  6. Step 6: Final answer
    x = 108,540.30

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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.