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Finding the Fourth Proportional to 226,652.80, 339,979.20 and 78,908.80

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Solution

The fourth proportional to 226,652.80, 339,979.20 and 78,908.80 is: 118,363.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    226,652.80 : 339,979.20 = 78,908.80 : x
  2. Step 2: Convert to fraction form
    226,652.80/339,979.20 = 78,908.80/x
  3. Step 3: Cross multiply
    226,652.80x = 339,979.20 × 78,908.80
  4. Step 4: Simplify right side
    226,652.80x = 26,827,350,696.96
  5. Step 5: Solve for x
    x = 26,827,350,696.96/226,652.80
  6. Step 6: Final answer
    x = 118,363.20

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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.