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Finding the Fourth Proportional to 103,722.90, 155,325.15 and 68,471.70

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Solution

The fourth proportional to 103,722.90, 155,325.15 and 68,471.70 is: 102,536.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,722.90 : 155,325.15 = 68,471.70 : x
  2. Step 2: Convert to fraction form
    103,722.90/155,325.15 = 68,471.70/x
  3. Step 3: Cross multiply
    103,722.90x = 155,325.15 × 68,471.70
  4. Step 4: Simplify right side
    103,722.90x = 10,635,377,073.26
  5. Step 5: Solve for x
    x = 10,635,377,073.26/103,722.90
  6. Step 6: Final answer
    x = 102,536.44

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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.