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Finding the Fourth Proportional to 165,081.20, 247,621.80 and 123,090.80

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Solution

The fourth proportional to 165,081.20, 247,621.80 and 123,090.80 is: 184,636.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,081.20 : 247,621.80 = 123,090.80 : x
  2. Step 2: Convert to fraction form
    165,081.20/247,621.80 = 123,090.80/x
  3. Step 3: Cross multiply
    165,081.20x = 247,621.80 × 123,090.80
  4. Step 4: Simplify right side
    165,081.20x = 30,479,965,459.44
  5. Step 5: Solve for x
    x = 30,479,965,459.44/165,081.20
  6. Step 6: Final answer
    x = 184,636.20

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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.