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Finding the Fourth Proportional to 226,636.80, 339,955.20 and 78,892.80

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Solution

The fourth proportional to 226,636.80, 339,955.20 and 78,892.80 is: 118,339.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    226,636.80 : 339,955.20 = 78,892.80 : x
  2. Step 2: Convert to fraction form
    226,636.80/339,955.20 = 78,892.80/x
  3. Step 3: Cross multiply
    226,636.80x = 339,955.20 × 78,892.80
  4. Step 4: Simplify right side
    226,636.80x = 26,820,017,602.56
  5. Step 5: Solve for x
    x = 26,820,017,602.56/226,636.80
  6. Step 6: Final answer
    x = 118,339.20

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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.