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Finding the Fourth Proportional to 80,208.89, 120,271.81 and 42,758.90

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Solution

The fourth proportional to 80,208.89, 120,271.81 and 42,758.90 is: 64,116.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,208.89 : 120,271.81 = 42,758.90 : x
  2. Step 2: Convert to fraction form
    80,208.89/120,271.81 = 42,758.90/x
  3. Step 3: Cross multiply
    80,208.89x = 120,271.81 × 42,758.90
  4. Step 4: Simplify right side
    80,208.89x = 5,142,690,082.81
  5. Step 5: Solve for x
    x = 5,142,690,082.81/80,208.89
  6. Step 6: Final answer
    x = 64,116.21

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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.