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Finding the Fourth Proportional to 80,662.87, 120,827.85 and 47,281.57

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Solution

The fourth proportional to 80,662.87, 120,827.85 and 47,281.57 is: 70,824.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,662.87 : 120,827.85 = 47,281.57 : x
  2. Step 2: Convert to fraction form
    80,662.87/120,827.85 = 47,281.57/x
  3. Step 3: Cross multiply
    80,662.87x = 120,827.85 × 47,281.57
  4. Step 4: Simplify right side
    80,662.87x = 5,712,930,447.72
  5. Step 5: Solve for x
    x = 5,712,930,447.72/80,662.87
  6. Step 6: Final answer
    x = 70,824.79

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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.