Home / 121,098.64-167,139.25-80,190.66

Finding the Fourth Proportional to 121,098.64, 167,139.25 and 80,190.66

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Solution

The fourth proportional to 121,098.64, 167,139.25 and 80,190.66 is: 110,678.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,098.64 : 167,139.25 = 80,190.66 : x
  2. Step 2: Convert to fraction form
    121,098.64/167,139.25 = 80,190.66/x
  3. Step 3: Cross multiply
    121,098.64x = 167,139.25 × 80,190.66
  4. Step 4: Simplify right side
    121,098.64x = 13,403,006,568.93
  5. Step 5: Solve for x
    x = 13,403,006,568.93/121,098.64
  6. Step 6: Final answer
    x = 110,678.43

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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.