Home / 72,872.13-109,308.20-20,282.98

Finding the Fourth Proportional to 72,872.13, 109,308.20 and 20,282.98

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Solution

The fourth proportional to 72,872.13, 109,308.20 and 20,282.98 is: 30,424.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,872.13 : 109,308.20 = 20,282.98 : x
  2. Step 2: Convert to fraction form
    72,872.13/109,308.20 = 20,282.98/x
  3. Step 3: Cross multiply
    72,872.13x = 109,308.20 × 20,282.98
  4. Step 4: Simplify right side
    72,872.13x = 2,217,096,034.44
  5. Step 5: Solve for x
    x = 2,217,096,034.44/72,872.13
  6. Step 6: Final answer
    x = 30,424.47

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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.