Home / 138,961.92-191,766.80-75,299.76

Finding the Fourth Proportional to 138,961.92, 191,766.80 and 75,299.76

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Solution

The fourth proportional to 138,961.92, 191,766.80 and 75,299.76 is: 103,913.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,961.92 : 191,766.80 = 75,299.76 : x
  2. Step 2: Convert to fraction form
    138,961.92/191,766.80 = 75,299.76/x
  3. Step 3: Cross multiply
    138,961.92x = 191,766.80 × 75,299.76
  4. Step 4: Simplify right side
    138,961.92x = 14,439,994,015.97
  5. Step 5: Solve for x
    x = 14,439,994,015.97/138,961.92
  6. Step 6: Final answer
    x = 103,913.32

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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.