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Finding the Fourth Proportional to 84,310.70, 126,466.05 and 80,422.70

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Solution

The fourth proportional to 84,310.70, 126,466.05 and 80,422.70 is: 120,634.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,310.70 : 126,466.05 = 80,422.70 : x
  2. Step 2: Convert to fraction form
    84,310.70/126,466.05 = 80,422.70/x
  3. Step 3: Cross multiply
    84,310.70x = 126,466.05 × 80,422.70
  4. Step 4: Simplify right side
    84,310.70x = 10,170,741,199.34
  5. Step 5: Solve for x
    x = 10,170,741,199.34/84,310.70
  6. Step 6: Final answer
    x = 120,634.05

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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.