Home / 122,456.68-168,997.78-81,550.66

Finding the Fourth Proportional to 122,456.68, 168,997.78 and 81,550.66

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Solution

The fourth proportional to 122,456.68, 168,997.78 and 81,550.66 is: 112,544.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,456.68 : 168,997.78 = 81,550.66 : x
  2. Step 2: Convert to fraction form
    122,456.68/168,997.78 = 81,550.66/x
  3. Step 3: Cross multiply
    122,456.68x = 168,997.78 × 81,550.66
  4. Step 4: Simplify right side
    122,456.68x = 13,781,880,497.53
  5. Step 5: Solve for x
    x = 13,781,880,497.53/122,456.68
  6. Step 6: Final answer
    x = 112,544.95

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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.