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Finding the Fourth Proportional to 45,387, 68,082.12 and 12,108.96

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Solution

The fourth proportional to 45,387, 68,082.12 and 12,108.96 is: 18,163.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,387 : 68,082.12 = 12,108.96 : x
  2. Step 2: Convert to fraction form
    45,387/68,082.12 = 12,108.96/x
  3. Step 3: Cross multiply
    45,387x = 68,082.12 × 12,108.96
  4. Step 4: Simplify right side
    45,387x = 824,403,667.80
  5. Step 5: Solve for x
    x = 824,403,667.80/45,387
  6. Step 6: Final answer
    x = 18,163.87

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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.