Home / 121,825.62-168,123.06-68,112.90

Finding the Fourth Proportional to 121,825.62, 168,123.06 and 68,112.90

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Solution

The fourth proportional to 121,825.62, 168,123.06 and 68,112.90 is: 93,997.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,825.62 : 168,123.06 = 68,112.90 : x
  2. Step 2: Convert to fraction form
    121,825.62/168,123.06 = 68,112.90/x
  3. Step 3: Cross multiply
    121,825.62x = 168,123.06 × 68,112.90
  4. Step 4: Simplify right side
    121,825.62x = 11,451,349,173.47
  5. Step 5: Solve for x
    x = 11,451,349,173.47/121,825.62
  6. Step 6: Final answer
    x = 93,997.87

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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.