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Finding the Fourth Proportional to 123,618.62, 170,571.47 and 69,171.89

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Solution

The fourth proportional to 123,618.62, 170,571.47 and 69,171.89 is: 95,444.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,618.62 : 170,571.47 = 69,171.89 : x
  2. Step 2: Convert to fraction form
    123,618.62/170,571.47 = 69,171.89/x
  3. Step 3: Cross multiply
    123,618.62x = 170,571.47 × 69,171.89
  4. Step 4: Simplify right side
    123,618.62x = 11,798,749,761.26
  5. Step 5: Solve for x
    x = 11,798,749,761.26/123,618.62
  6. Step 6: Final answer
    x = 95,444.77

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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.