Home / 121,138.66-167,177.28-73,396.45

Finding the Fourth Proportional to 121,138.66, 167,177.28 and 73,396.45

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Solution

The fourth proportional to 121,138.66, 167,177.28 and 73,396.45 is: 101,290.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,138.66 : 167,177.28 = 73,396.45 : x
  2. Step 2: Convert to fraction form
    121,138.66/167,177.28 = 73,396.45/x
  3. Step 3: Cross multiply
    121,138.66x = 167,177.28 × 73,396.45
  4. Step 4: Simplify right side
    121,138.66x = 12,270,218,872.66
  5. Step 5: Solve for x
    x = 12,270,218,872.66/121,138.66
  6. Step 6: Final answer
    x = 101,290.69

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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.