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Finding the Fourth Proportional to 116.89, 161.27 and 70.28

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Solution

The fourth proportional to 116.89, 161.27 and 70.28 is: 96.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.89 : 161.27 = 70.28 : x
  2. Step 2: Convert to fraction form
    116.89/161.27 = 70.28/x
  3. Step 3: Cross multiply
    116.89x = 161.27 × 70.28
  4. Step 4: Simplify right side
    116.89x = 11,335.07
  5. Step 5: Solve for x
    x = 11,335.07/116.89
  6. Step 6: Final answer
    x = 96.97

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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.