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Finding the Fourth Proportional to 83,903.70, 125,855.55 and 80,015.70

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Solution

The fourth proportional to 83,903.70, 125,855.55 and 80,015.70 is: 120,023.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,903.70 : 125,855.55 = 80,015.70 : x
  2. Step 2: Convert to fraction form
    83,903.70/125,855.55 = 80,015.70/x
  3. Step 3: Cross multiply
    83,903.70x = 125,855.55 × 80,015.70
  4. Step 4: Simplify right side
    83,903.70x = 10,070,419,932.14
  5. Step 5: Solve for x
    x = 10,070,419,932.14/83,903.70
  6. Step 6: Final answer
    x = 120,023.55

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1.5x scale

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.