Home / 80,376.30-120,565.08-21,211.56

Finding the Fourth Proportional to 80,376.30, 120,565.08 and 21,211.56

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Solution

The fourth proportional to 80,376.30, 120,565.08 and 21,211.56 is: 31,817.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,376.30 : 120,565.08 = 21,211.56 : x
  2. Step 2: Convert to fraction form
    80,376.30/120,565.08 = 21,211.56/x
  3. Step 3: Cross multiply
    80,376.30x = 120,565.08 × 21,211.56
  4. Step 4: Simplify right side
    80,376.30x = 2,557,373,428.32
  5. Step 5: Solve for x
    x = 2,557,373,428.32/80,376.30
  6. Step 6: Final answer
    x = 31,817.51

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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.