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Finding the Fourth Proportional to 100,168.96, 138,228.48 and 55,453.44

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Solution

The fourth proportional to 100,168.96, 138,228.48 and 55,453.44 is: 76,523.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,168.96 : 138,228.48 = 55,453.44 : x
  2. Step 2: Convert to fraction form
    100,168.96/138,228.48 = 55,453.44/x
  3. Step 3: Cross multiply
    100,168.96x = 138,228.48 × 55,453.44
  4. Step 4: Simplify right side
    100,168.96x = 7,665,244,721.97
  5. Step 5: Solve for x
    x = 7,665,244,721.97/100,168.96
  6. Step 6: Final answer
    x = 76,523.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.