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Finding the Fourth Proportional to 80,161.92, 120,242.88 and 45,126.72

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Solution

The fourth proportional to 80,161.92, 120,242.88 and 45,126.72 is: 67,690.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,161.92 : 120,242.88 = 45,126.72 : x
  2. Step 2: Convert to fraction form
    80,161.92/120,242.88 = 45,126.72/x
  3. Step 3: Cross multiply
    80,161.92x = 120,242.88 × 45,126.72
  4. Step 4: Simplify right side
    80,161.92x = 5,426,166,777.75
  5. Step 5: Solve for x
    x = 5,426,166,777.75/80,161.92
  6. Step 6: Final answer
    x = 67,690.08

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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.