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Finding the Fourth Proportional to 165,587.20, 248,380.80 and 67,091.20

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Solution

The fourth proportional to 165,587.20, 248,380.80 and 67,091.20 is: 100,636.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,587.20 : 248,380.80 = 67,091.20 : x
  2. Step 2: Convert to fraction form
    165,587.20/248,380.80 = 67,091.20/x
  3. Step 3: Cross multiply
    165,587.20x = 248,380.80 × 67,091.20
  4. Step 4: Simplify right side
    165,587.20x = 16,664,165,928.96
  5. Step 5: Solve for x
    x = 16,664,165,928.96/165,587.20
  6. Step 6: Final answer
    x = 100,636.80

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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.