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Finding the Fourth Proportional to 121,765.01, 168,027.62 and 68,039.60

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Solution

The fourth proportional to 121,765.01, 168,027.62 and 68,039.60 is: 93,890.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,765.01 : 168,027.62 = 68,039.60 : x
  2. Step 2: Convert to fraction form
    121,765.01/168,027.62 = 68,039.60/x
  3. Step 3: Cross multiply
    121,765.01x = 168,027.62 × 68,039.60
  4. Step 4: Simplify right side
    121,765.01x = 11,432,530,873.42
  5. Step 5: Solve for x
    x = 11,432,530,873.42/121,765.01
  6. Step 6: Final answer
    x = 93,890.12

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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.