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Finding the Fourth Proportional to 165,581.70, 248,202.45 and 81,212.10

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Solution

The fourth proportional to 165,581.70, 248,202.45 and 81,212.10 is: 121,734.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,581.70 : 248,202.45 = 81,212.10 : x
  2. Step 2: Convert to fraction form
    165,581.70/248,202.45 = 81,212.10/x
  3. Step 3: Cross multiply
    165,581.70x = 248,202.45 × 81,212.10
  4. Step 4: Simplify right side
    165,581.70x = 20,157,042,189.65
  5. Step 5: Solve for x
    x = 20,157,042,189.65/165,581.70
  6. Step 6: Final answer
    x = 121,734.72

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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.