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Finding the Fourth Proportional to 123,693.14, 170,691.30 and 69,979.07

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Solution

The fourth proportional to 123,693.14, 170,691.30 and 69,979.07 is: 96,568.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,693.14 : 170,691.30 = 69,979.07 : x
  2. Step 2: Convert to fraction form
    123,693.14/170,691.30 = 69,979.07/x
  3. Step 3: Cross multiply
    123,693.14x = 170,691.30 × 69,979.07
  4. Step 4: Simplify right side
    123,693.14x = 11,944,818,857.82
  5. Step 5: Solve for x
    x = 11,944,818,857.82/123,693.14
  6. Step 6: Final answer
    x = 96,568.16

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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.