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Finding the Fourth Proportional to 123,238.67, 170,069.42 and 66,650.04

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Solution

The fourth proportional to 123,238.67, 170,069.42 and 66,650.04 is: 91,977.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,238.67 : 170,069.42 = 66,650.04 : x
  2. Step 2: Convert to fraction form
    123,238.67/170,069.42 = 66,650.04/x
  3. Step 3: Cross multiply
    123,238.67x = 170,069.42 × 66,650.04
  4. Step 4: Simplify right side
    123,238.67x = 11,335,133,812.40
  5. Step 5: Solve for x
    x = 11,335,133,812.40/123,238.67
  6. Step 6: Final answer
    x = 91,977.09

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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.