Home / 121,568.25-167,853.09-78,573.21

Finding the Fourth Proportional to 121,568.25, 167,853.09 and 78,573.21

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Solution

The fourth proportional to 121,568.25, 167,853.09 and 78,573.21 is: 108,488.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,568.25 : 167,853.09 = 78,573.21 : x
  2. Step 2: Convert to fraction form
    121,568.25/167,853.09 = 78,573.21/x
  3. Step 3: Cross multiply
    121,568.25x = 167,853.09 × 78,573.21
  4. Step 4: Simplify right side
    121,568.25x = 13,188,756,089.72
  5. Step 5: Solve for x
    x = 13,188,756,089.72/121,568.25
  6. Step 6: Final answer
    x = 108,488.49

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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.