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Finding the Fourth Proportional to 116,698.78, 161,044.97 and 66,397.78

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Solution

The fourth proportional to 116,698.78, 161,044.97 and 66,397.78 is: 91,629.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,698.78 : 161,044.97 = 66,397.78 : x
  2. Step 2: Convert to fraction form
    116,698.78/161,044.97 = 66,397.78/x
  3. Step 3: Cross multiply
    116,698.78x = 161,044.97 × 66,397.78
  4. Step 4: Simplify right side
    116,698.78x = 10,693,028,488.17
  5. Step 5: Solve for x
    x = 10,693,028,488.17/116,698.78
  6. Step 6: Final answer
    x = 91,629.31

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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.