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Finding the Fourth Proportional to 103,711.10, 155,177.85 and 68,719.10

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Solution

The fourth proportional to 103,711.10, 155,177.85 and 68,719.10 is: 102,821.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,711.10 : 155,177.85 = 68,719.10 : x
  2. Step 2: Convert to fraction form
    103,711.10/155,177.85 = 68,719.10/x
  3. Step 3: Cross multiply
    103,711.10x = 155,177.85 × 68,719.10
  4. Step 4: Simplify right side
    103,711.10x = 10,663,682,191.94
  5. Step 5: Solve for x
    x = 10,663,682,191.94/103,711.10
  6. Step 6: Final answer
    x = 102,821.03

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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.