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Finding the Fourth Proportional to 225,761.41, 311,560.29 and 128,981.19

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Solution

The fourth proportional to 225,761.41, 311,560.29 and 128,981.19 is: 177,999.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,761.41 : 311,560.29 = 128,981.19 : x
  2. Step 2: Convert to fraction form
    225,761.41/311,560.29 = 128,981.19/x
  3. Step 3: Cross multiply
    225,761.41x = 311,560.29 × 128,981.19
  4. Step 4: Simplify right side
    225,761.41x = 40,185,416,960.95
  5. Step 5: Solve for x
    x = 40,185,416,960.95/225,761.41
  6. Step 6: Final answer
    x = 177,999.49

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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.