Home / 420,082.20-629,933.76-120,494.79

Finding the Fourth Proportional to 420,082.20, 629,933.76 and 120,494.79

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Solution

The fourth proportional to 420,082.20, 629,933.76 and 120,494.79 is: 180,687.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,082.20 : 629,933.76 = 120,494.79 : x
  2. Step 2: Convert to fraction form
    420,082.20/629,933.76 = 120,494.79/x
  3. Step 3: Cross multiply
    420,082.20x = 629,933.76 × 120,494.79
  4. Step 4: Simplify right side
    420,082.20x = 75,903,736,125.11
  5. Step 5: Solve for x
    x = 75,903,736,125.11/420,082.20
  6. Step 6: Final answer
    x = 180,687.82

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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.