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Finding the Fourth Proportional to 168,275.01, 252,270.97 and 78,272

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Solution

The fourth proportional to 168,275.01, 252,270.97 and 78,272 is: 117,342.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,275.01 : 252,270.97 = 78,272 : x
  2. Step 2: Convert to fraction form
    168,275.01/252,270.97 = 78,272/x
  3. Step 3: Cross multiply
    168,275.01x = 252,270.97 × 78,272
  4. Step 4: Simplify right side
    168,275.01x = 19,745,753,363.84
  5. Step 5: Solve for x
    x = 19,745,753,363.84/168,275.01
  6. Step 6: Final answer
    x = 117,342.16

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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.