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Finding the Fourth Proportional to 165,991.20, 248,689.80 and 100,957.20

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Solution

The fourth proportional to 165,991.20, 248,689.80 and 100,957.20 is: 151,255.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,991.20 : 248,689.80 = 100,957.20 : x
  2. Step 2: Convert to fraction form
    165,991.20/248,689.80 = 100,957.20/x
  3. Step 3: Cross multiply
    165,991.20x = 248,689.80 × 100,957.20
  4. Step 4: Simplify right side
    165,991.20x = 25,107,025,876.56
  5. Step 5: Solve for x
    x = 25,107,025,876.56/165,991.20
  6. Step 6: Final answer
    x = 151,255.16

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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.