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Finding the Fourth Proportional to 257,443.44, 386,191.11 and 67,916.91

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Solution

The fourth proportional to 257,443.44, 386,191.11 and 67,916.91 is: 101,882.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,443.44 : 386,191.11 = 67,916.91 : x
  2. Step 2: Convert to fraction form
    257,443.44/386,191.11 = 67,916.91/x
  3. Step 3: Cross multiply
    257,443.44x = 386,191.11 × 67,916.91
  4. Step 4: Simplify right side
    257,443.44x = 26,228,906,860.67
  5. Step 5: Solve for x
    x = 26,228,906,860.67/257,443.44
  6. Step 6: Final answer
    x = 101,882.21

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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.