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Finding the Fourth Proportional to 161,801.20, 242,615.40 and 68,201.20

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Solution

The fourth proportional to 161,801.20, 242,615.40 and 68,201.20 is: 102,265.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,801.20 : 242,615.40 = 68,201.20 : x
  2. Step 2: Convert to fraction form
    161,801.20/242,615.40 = 68,201.20/x
  3. Step 3: Cross multiply
    161,801.20x = 242,615.40 × 68,201.20
  4. Step 4: Simplify right side
    161,801.20x = 16,546,661,418.48
  5. Step 5: Solve for x
    x = 16,546,661,418.48/161,801.20
  6. Step 6: Final answer
    x = 102,265.38

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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.