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Finding the Fourth Proportional to 80,425.80, 120,735.90 and 79,842.60

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Solution

The fourth proportional to 80,425.80, 120,735.90 and 79,842.60 is: 119,860.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,425.80 : 120,735.90 = 79,842.60 : x
  2. Step 2: Convert to fraction form
    80,425.80/120,735.90 = 79,842.60/x
  3. Step 3: Cross multiply
    80,425.80x = 120,735.90 × 79,842.60
  4. Step 4: Simplify right side
    80,425.80x = 9,639,868,169.34
  5. Step 5: Solve for x
    x = 9,639,868,169.34/80,425.80
  6. Step 6: Final answer
    x = 119,860.40

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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.