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Finding the Fourth Proportional to 119,912.78, 165,475.29 and 66,196.64

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Solution

The fourth proportional to 119,912.78, 165,475.29 and 66,196.64 is: 91,348.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,912.78 : 165,475.29 = 66,196.64 : x
  2. Step 2: Convert to fraction form
    119,912.78/165,475.29 = 66,196.64/x
  3. Step 3: Cross multiply
    119,912.78x = 165,475.29 × 66,196.64
  4. Step 4: Simplify right side
    119,912.78x = 10,953,908,201.03
  5. Step 5: Solve for x
    x = 10,953,908,201.03/119,912.78
  6. Step 6: Final answer
    x = 91,348.96

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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.