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Finding the Fourth Proportional to 225,637.69, 311,383.65 and 123,672.91

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Solution

The fourth proportional to 225,637.69, 311,383.65 and 123,672.91 is: 170,670.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,637.69 : 311,383.65 = 123,672.91 : x
  2. Step 2: Convert to fraction form
    225,637.69/311,383.65 = 123,672.91/x
  3. Step 3: Cross multiply
    225,637.69x = 311,383.65 × 123,672.91
  4. Step 4: Simplify right side
    225,637.69x = 38,509,722,121.92
  5. Step 5: Solve for x
    x = 38,509,722,121.92/225,637.69
  6. Step 6: Final answer
    x = 170,670.61

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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.