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Finding the Fourth Proportional to 165,616.80, 248,425.20 and 86,755.20

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Solution

The fourth proportional to 165,616.80, 248,425.20 and 86,755.20 is: 130,132.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,616.80 : 248,425.20 = 86,755.20 : x
  2. Step 2: Convert to fraction form
    165,616.80/248,425.20 = 86,755.20/x
  3. Step 3: Cross multiply
    165,616.80x = 248,425.20 × 86,755.20
  4. Step 4: Simplify right side
    165,616.80x = 21,552,177,911.04
  5. Step 5: Solve for x
    x = 21,552,177,911.04/165,616.80
  6. Step 6: Final answer
    x = 130,132.80

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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.