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Finding the Fourth Proportional to 123,242.76, 170,074.89 and 66,654

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Solution

The fourth proportional to 123,242.76, 170,074.89 and 66,654 is: 91,982.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,242.76 : 170,074.89 = 66,654 : x
  2. Step 2: Convert to fraction form
    123,242.76/170,074.89 = 66,654/x
  3. Step 3: Cross multiply
    123,242.76x = 170,074.89 × 66,654
  4. Step 4: Simplify right side
    123,242.76x = 11,336,171,718.06
  5. Step 5: Solve for x
    x = 11,336,171,718.06/123,242.76
  6. Step 6: Final answer
    x = 91,982.46

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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.