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Finding the Fourth Proportional to 121,750.82, 168,015.87 and 68,035.85

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Solution

The fourth proportional to 121,750.82, 168,015.87 and 68,035.85 is: 93,889.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,750.82 : 168,015.87 = 68,035.85 : x
  2. Step 2: Convert to fraction form
    121,750.82/168,015.87 = 68,035.85/x
  3. Step 3: Cross multiply
    121,750.82x = 168,015.87 × 68,035.85
  4. Step 4: Simplify right side
    121,750.82x = 11,431,101,688.86
  5. Step 5: Solve for x
    x = 11,431,101,688.86/121,750.82
  6. Step 6: Final answer
    x = 93,889.32

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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.