Home / 225,518.54-311,207.45-128,727.38

Finding the Fourth Proportional to 225,518.54, 311,207.45 and 128,727.38

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Solution

The fourth proportional to 225,518.54, 311,207.45 and 128,727.38 is: 177,639.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,518.54 : 311,207.45 = 128,727.38 : x
  2. Step 2: Convert to fraction form
    225,518.54/311,207.45 = 128,727.38/x
  3. Step 3: Cross multiply
    225,518.54x = 311,207.45 × 128,727.38
  4. Step 4: Simplify right side
    225,518.54x = 40,060,920,774.82
  5. Step 5: Solve for x
    x = 40,060,920,774.82/225,518.54
  6. Step 6: Final answer
    x = 177,639.15

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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.