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Finding the Fourth Proportional to 80,609.98, 120,899.20 and 76,609.26

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Solution

The fourth proportional to 80,609.98, 120,899.20 and 76,609.26 is: 114,898.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,609.98 : 120,899.20 = 76,609.26 : x
  2. Step 2: Convert to fraction form
    80,609.98/120,899.20 = 76,609.26/x
  3. Step 3: Cross multiply
    80,609.98x = 120,899.20 × 76,609.26
  4. Step 4: Simplify right side
    80,609.98x = 9,261,998,246.59
  5. Step 5: Solve for x
    x = 9,261,998,246.59/80,609.98
  6. Step 6: Final answer
    x = 114,898.90

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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.