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Finding the Fourth Proportional to 100,195.39, 138,363.30 and 64,447.46

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Solution

The fourth proportional to 100,195.39, 138,363.30 and 64,447.46 is: 88,997.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,195.39 : 138,363.30 = 64,447.46 : x
  2. Step 2: Convert to fraction form
    100,195.39/138,363.30 = 64,447.46/x
  3. Step 3: Cross multiply
    100,195.39x = 138,363.30 × 64,447.46
  4. Step 4: Simplify right side
    100,195.39x = 8,917,162,228.16
  5. Step 5: Solve for x
    x = 8,917,162,228.16/100,195.39
  6. Step 6: Final answer
    x = 88,997.73

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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.