Home / 225,389.12-311,045.38-128,608.74

Finding the Fourth Proportional to 225,389.12, 311,045.38 and 128,608.74

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Solution

The fourth proportional to 225,389.12, 311,045.38 and 128,608.74 is: 177,484.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,389.12 : 311,045.38 = 128,608.74 : x
  2. Step 2: Convert to fraction form
    225,389.12/311,045.38 = 128,608.74/x
  3. Step 3: Cross multiply
    225,389.12x = 311,045.38 × 128,608.74
  4. Step 4: Simplify right side
    225,389.12x = 40,003,154,404.62
  5. Step 5: Solve for x
    x = 40,003,154,404.62/225,389.12
  6. Step 6: Final answer
    x = 177,484.85

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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.