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Finding the Fourth Proportional to 165,078.80, 247,618.20 and 40,419.80

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Solution

The fourth proportional to 165,078.80, 247,618.20 and 40,419.80 is: 60,629.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,078.80 : 247,618.20 = 40,419.80 : x
  2. Step 2: Convert to fraction form
    165,078.80/247,618.20 = 40,419.80/x
  3. Step 3: Cross multiply
    165,078.80x = 247,618.20 × 40,419.80
  4. Step 4: Simplify right side
    165,078.80x = 10,008,678,120.36
  5. Step 5: Solve for x
    x = 10,008,678,120.36/165,078.80
  6. Step 6: Final answer
    x = 60,629.70

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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.