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Finding the Fourth Proportional to 126,761.78, 175,049.78 and 81,518.32

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Solution

The fourth proportional to 126,761.78, 175,049.78 and 81,518.32 is: 112,571.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,761.78 : 175,049.78 = 81,518.32 : x
  2. Step 2: Convert to fraction form
    126,761.78/175,049.78 = 81,518.32/x
  3. Step 3: Cross multiply
    126,761.78x = 175,049.78 × 81,518.32
  4. Step 4: Simplify right side
    126,761.78x = 14,269,763,981.97
  5. Step 5: Solve for x
    x = 14,269,763,981.97/126,761.78
  6. Step 6: Final answer
    x = 112,571.50

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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.