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Finding the Fourth Proportional to 120,189.93, 165,857.45 and 66,475.84

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Solution

The fourth proportional to 120,189.93, 165,857.45 and 66,475.84 is: 91,734.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,189.93 : 165,857.45 = 66,475.84 : x
  2. Step 2: Convert to fraction form
    120,189.93/165,857.45 = 66,475.84/x
  3. Step 3: Cross multiply
    120,189.93x = 165,857.45 × 66,475.84
  4. Step 4: Simplify right side
    120,189.93x = 11,025,513,059.93
  5. Step 5: Solve for x
    x = 11,025,513,059.93/120,189.93
  6. Step 6: Final answer
    x = 91,734.09

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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.