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Finding the Fourth Proportional to 225,629.27, 311,368.45 and 123,658.78

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Solution

The fourth proportional to 225,629.27, 311,368.45 and 123,658.78 is: 170,649.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,629.27 : 311,368.45 = 123,658.78 : x
  2. Step 2: Convert to fraction form
    225,629.27/311,368.45 = 123,658.78/x
  3. Step 3: Cross multiply
    225,629.27x = 311,368.45 × 123,658.78
  4. Step 4: Simplify right side
    225,629.27x = 38,503,442,657.49
  5. Step 5: Solve for x
    x = 38,503,442,657.49/225,629.27
  6. Step 6: Final answer
    x = 170,649.15

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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.