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Finding the Fourth Proportional to 225,665.76, 311,406.40 and 123,672.80

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Solution

The fourth proportional to 225,665.76, 311,406.40 and 123,672.80 is: 170,661.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,665.76 : 311,406.40 = 123,672.80 : x
  2. Step 2: Convert to fraction form
    225,665.76/311,406.40 = 123,672.80/x
  3. Step 3: Cross multiply
    225,665.76x = 311,406.40 × 123,672.80
  4. Step 4: Simplify right side
    225,665.76x = 38,512,501,425.92
  5. Step 5: Solve for x
    x = 38,512,501,425.92/225,665.76
  6. Step 6: Final answer
    x = 170,661.70

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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.