Home / 121,439.43-167,529.22-78,982.47

Finding the Fourth Proportional to 121,439.43, 167,529.22 and 78,982.47

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Solution

The fourth proportional to 121,439.43, 167,529.22 and 78,982.47 is: 108,958.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,439.43 : 167,529.22 = 78,982.47 : x
  2. Step 2: Convert to fraction form
    121,439.43/167,529.22 = 78,982.47/x
  3. Step 3: Cross multiply
    121,439.43x = 167,529.22 × 78,982.47
  4. Step 4: Simplify right side
    121,439.43x = 13,231,871,395.32
  5. Step 5: Solve for x
    x = 13,231,871,395.32/121,439.43
  6. Step 6: Final answer
    x = 108,958.61

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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.