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Finding the Fourth Proportional to 116.53, 161.06 and 87.37

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Solution

The fourth proportional to 116.53, 161.06 and 87.37 is: 120.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.53 : 161.06 = 87.37 : x
  2. Step 2: Convert to fraction form
    116.53/161.06 = 87.37/x
  3. Step 3: Cross multiply
    116.53x = 161.06 × 87.37
  4. Step 4: Simplify right side
    116.53x = 14,072.03
  5. Step 5: Solve for x
    x = 14,072.03/116.53
  6. Step 6: Final answer
    x = 120.76

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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.