Home / 122,099.75-168,496.17-71,120.78

Finding the Fourth Proportional to 122,099.75, 168,496.17 and 71,120.78

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Solution

The fourth proportional to 122,099.75, 168,496.17 and 71,120.78 is: 98,145.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,099.75 : 168,496.17 = 71,120.78 : x
  2. Step 2: Convert to fraction form
    122,099.75/168,496.17 = 71,120.78/x
  3. Step 3: Cross multiply
    122,099.75x = 168,496.17 × 71,120.78
  4. Step 4: Simplify right side
    122,099.75x = 11,983,578,194.93
  5. Step 5: Solve for x
    x = 11,983,578,194.93/122,099.75
  6. Step 6: Final answer
    x = 98,145.81

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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.