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Finding the Fourth Proportional to 121,765.32, 168,035.60 and 68,050.32

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Solution

The fourth proportional to 121,765.32, 168,035.60 and 68,050.32 is: 93,909.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,765.32 : 168,035.60 = 68,050.32 : x
  2. Step 2: Convert to fraction form
    121,765.32/168,035.60 = 68,050.32/x
  3. Step 3: Cross multiply
    121,765.32x = 168,035.60 × 68,050.32
  4. Step 4: Simplify right side
    121,765.32x = 11,434,876,351.39
  5. Step 5: Solve for x
    x = 11,434,876,351.39/121,765.32
  6. Step 6: Final answer
    x = 93,909.14

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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.