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Finding the Fourth Proportional to 80,378.70, 120,540.32 and 32,980.33

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Solution

The fourth proportional to 80,378.70, 120,540.32 and 32,980.33 is: 49,459.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,378.70 : 120,540.32 = 32,980.33 : x
  2. Step 2: Convert to fraction form
    80,378.70/120,540.32 = 32,980.33/x
  3. Step 3: Cross multiply
    80,378.70x = 120,540.32 × 32,980.33
  4. Step 4: Simplify right side
    80,378.70x = 3,975,459,641.36
  5. Step 5: Solve for x
    x = 3,975,459,641.36/80,378.70
  6. Step 6: Final answer
    x = 49,459.12

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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.