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Finding the Fourth Proportional to 225,498.70, 311,193.23 and 128,700.62

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Solution

The fourth proportional to 225,498.70, 311,193.23 and 128,700.62 is: 177,609.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,498.70 : 311,193.23 = 128,700.62 : x
  2. Step 2: Convert to fraction form
    225,498.70/311,193.23 = 128,700.62/x
  3. Step 3: Cross multiply
    225,498.70x = 311,193.23 × 128,700.62
  4. Step 4: Simplify right side
    225,498.70x = 40,050,761,640.80
  5. Step 5: Solve for x
    x = 40,050,761,640.80/225,498.70
  6. Step 6: Final answer
    x = 177,609.72

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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.