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Finding the Fourth Proportional to 225,514.96, 311,133.34 and 128,649.20

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Solution

The fourth proportional to 225,514.96, 311,133.34 and 128,649.20 is: 177,491.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,514.96 : 311,133.34 = 128,649.20 : x
  2. Step 2: Convert to fraction form
    225,514.96/311,133.34 = 128,649.20/x
  3. Step 3: Cross multiply
    225,514.96x = 311,133.34 × 128,649.20
  4. Step 4: Simplify right side
    225,514.96x = 40,027,055,284.33
  5. Step 5: Solve for x
    x = 40,027,055,284.33/225,514.96
  6. Step 6: Final answer
    x = 177,491.80

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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.