Home / 225,557.28-311,279.34-128,787.32

Finding the Fourth Proportional to 225,557.28, 311,279.34 and 128,787.32

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Solution

The fourth proportional to 225,557.28, 311,279.34 and 128,787.32 is: 177,732.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,557.28 : 311,279.34 = 128,787.32 : x
  2. Step 2: Convert to fraction form
    225,557.28/311,279.34 = 128,787.32/x
  3. Step 3: Cross multiply
    225,557.28x = 311,279.34 × 128,787.32
  4. Step 4: Simplify right side
    225,557.28x = 40,088,830,413.57
  5. Step 5: Solve for x
    x = 40,088,830,413.57/225,557.28
  6. Step 6: Final answer
    x = 177,732.37

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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.