Home / 218,631.28-327,984.24-100,312.72

Finding the Fourth Proportional to 218,631.28, 327,984.24 and 100,312.72

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Solution

The fourth proportional to 218,631.28, 327,984.24 and 100,312.72 is: 150,486.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,631.28 : 327,984.24 = 100,312.72 : x
  2. Step 2: Convert to fraction form
    218,631.28/327,984.24 = 100,312.72/x
  3. Step 3: Cross multiply
    218,631.28x = 327,984.24 × 100,312.72
  4. Step 4: Simplify right side
    218,631.28x = 32,900,991,231.53
  5. Step 5: Solve for x
    x = 32,900,991,231.53/218,631.28
  6. Step 6: Final answer
    x = 150,486.20

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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.