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Finding the Fourth Proportional to 80,701.80, 120,906.90 and 65,830.20

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Solution

The fourth proportional to 80,701.80, 120,906.90 and 65,830.20 is: 98,626.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,701.80 : 120,906.90 = 65,830.20 : x
  2. Step 2: Convert to fraction form
    80,701.80/120,906.90 = 65,830.20/x
  3. Step 3: Cross multiply
    80,701.80x = 120,906.90 × 65,830.20
  4. Step 4: Simplify right side
    80,701.80x = 7,959,325,408.38
  5. Step 5: Solve for x
    x = 7,959,325,408.38/80,701.80
  6. Step 6: Final answer
    x = 98,626.37

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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.