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Finding the Fourth Proportional to 120,326.16, 166,039.02 and 66,608.58

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Solution

The fourth proportional to 120,326.16, 166,039.02 and 66,608.58 is: 91,913.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,326.16 : 166,039.02 = 66,608.58 : x
  2. Step 2: Convert to fraction form
    120,326.16/166,039.02 = 66,608.58/x
  3. Step 3: Cross multiply
    120,326.16x = 166,039.02 × 66,608.58
  4. Step 4: Simplify right side
    120,326.16x = 11,059,623,346.79
  5. Step 5: Solve for x
    x = 11,059,623,346.79/120,326.16
  6. Step 6: Final answer
    x = 91,913.71

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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.