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Finding the Fourth Proportional to 226,455.60, 339,640.20 and 68,689.20

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Solution

The fourth proportional to 226,455.60, 339,640.20 and 68,689.20 is: 103,020.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    226,455.60 : 339,640.20 = 68,689.20 : x
  2. Step 2: Convert to fraction form
    226,455.60/339,640.20 = 68,689.20/x
  3. Step 3: Cross multiply
    226,455.60x = 339,640.20 × 68,689.20
  4. Step 4: Simplify right side
    226,455.60x = 23,329,613,625.84
  5. Step 5: Solve for x
    x = 23,329,613,625.84/226,455.60
  6. Step 6: Final answer
    x = 103,020.70

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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.