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Finding the Fourth Proportional to 80,654.70, 120,911.58 and 38,513.64

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Solution

The fourth proportional to 80,654.70, 120,911.58 and 38,513.64 is: 57,736.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,654.70 : 120,911.58 = 38,513.64 : x
  2. Step 2: Convert to fraction form
    80,654.70/120,911.58 = 38,513.64/x
  3. Step 3: Cross multiply
    80,654.70x = 120,911.58 × 38,513.64
  4. Step 4: Simplify right side
    80,654.70x = 4,656,745,063.95
  5. Step 5: Solve for x
    x = 4,656,745,063.95/80,654.70
  6. Step 6: Final answer
    x = 57,736.81

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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.