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Finding the Fourth Proportional to 138,795.48, 208,193.22 and 68,604.12

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Solution

The fourth proportional to 138,795.48, 208,193.22 and 68,604.12 is: 102,906.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,795.48 : 208,193.22 = 68,604.12 : x
  2. Step 2: Convert to fraction form
    138,795.48/208,193.22 = 68,604.12/x
  3. Step 3: Cross multiply
    138,795.48x = 208,193.22 × 68,604.12
  4. Step 4: Simplify right side
    138,795.48x = 14,282,912,648.07
  5. Step 5: Solve for x
    x = 14,282,912,648.07/138,795.48
  6. Step 6: Final answer
    x = 102,906.18

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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.