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Finding the Fourth Proportional to 116.81, 161.22 and 70.22

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Solution

The fourth proportional to 116.81, 161.22 and 70.22 is: 96.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.81 : 161.22 = 70.22 : x
  2. Step 2: Convert to fraction form
    116.81/161.22 = 70.22/x
  3. Step 3: Cross multiply
    116.81x = 161.22 × 70.22
  4. Step 4: Simplify right side
    116.81x = 11,320.87
  5. Step 5: Solve for x
    x = 11,320.87/116.81
  6. Step 6: Final answer
    x = 96.92

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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.