Home / 121,923.41-168,221.88-83,694.65

Finding the Fourth Proportional to 121,923.41, 168,221.88 and 83,694.65

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Solution

The fourth proportional to 121,923.41, 168,221.88 and 83,694.65 is: 115,476.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,923.41 : 168,221.88 = 83,694.65 : x
  2. Step 2: Convert to fraction form
    121,923.41/168,221.88 = 83,694.65/x
  3. Step 3: Cross multiply
    121,923.41x = 168,221.88 × 83,694.65
  4. Step 4: Simplify right side
    121,923.41x = 14,079,270,527.83
  5. Step 5: Solve for x
    x = 14,079,270,527.83/121,923.41
  6. Step 6: Final answer
    x = 115,476.36

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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.