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Finding the Fourth Proportional to 103,188.57, 154,782.89 and 68,120.03

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Solution

The fourth proportional to 103,188.57, 154,782.89 and 68,120.03 is: 102,180.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,188.57 : 154,782.89 = 68,120.03 : x
  2. Step 2: Convert to fraction form
    103,188.57/154,782.89 = 68,120.03/x
  3. Step 3: Cross multiply
    103,188.57x = 154,782.89 × 68,120.03
  4. Step 4: Simplify right side
    103,188.57x = 10,543,815,110.29
  5. Step 5: Solve for x
    x = 10,543,815,110.29/103,188.57
  6. Step 6: Final answer
    x = 102,180.07

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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.