Home / 225,387.12-311,042.62-128,606.74

Finding the Fourth Proportional to 225,387.12, 311,042.62 and 128,606.74

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Solution

The fourth proportional to 225,387.12, 311,042.62 and 128,606.74 is: 177,482.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,387.12 : 311,042.62 = 128,606.74 : x
  2. Step 2: Convert to fraction form
    225,387.12/311,042.62 = 128,606.74/x
  3. Step 3: Cross multiply
    225,387.12x = 311,042.62 × 128,606.74
  4. Step 4: Simplify right side
    225,387.12x = 40,002,176,019.00
  5. Step 5: Solve for x
    x = 40,002,176,019.00/225,387.12
  6. Step 6: Final answer
    x = 177,482.08

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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.