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Finding the Fourth Proportional to 121,879.64, 182,669.72 and 68,459.32

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Solution

The fourth proportional to 121,879.64, 182,669.72 and 68,459.32 is: 102,604.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,879.64 : 182,669.72 = 68,459.32 : x
  2. Step 2: Convert to fraction form
    121,879.64/182,669.72 = 68,459.32/x
  3. Step 3: Cross multiply
    121,879.64x = 182,669.72 × 68,459.32
  4. Step 4: Simplify right side
    121,879.64x = 12,505,444,815.79
  5. Step 5: Solve for x
    x = 12,505,444,815.79/121,879.64
  6. Step 6: Final answer
    x = 102,604.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.