Home / 149,380.92-206,146.44-81,398.64

Finding the Fourth Proportional to 149,380.92, 206,146.44 and 81,398.64

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Solution

The fourth proportional to 149,380.92, 206,146.44 and 81,398.64 is: 112,330.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,380.92 : 206,146.44 = 81,398.64 : x
  2. Step 2: Convert to fraction form
    149,380.92/206,146.44 = 81,398.64/x
  3. Step 3: Cross multiply
    149,380.92x = 206,146.44 × 81,398.64
  4. Step 4: Simplify right side
    149,380.92x = 16,780,039,856.84
  5. Step 5: Solve for x
    x = 16,780,039,856.84/149,380.92
  6. Step 6: Final answer
    x = 112,330.54

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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.