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Finding the Fourth Proportional to 117, 161.30 and 97.56

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Solution

The fourth proportional to 117, 161.30 and 97.56 is: 134.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    117 : 161.30 = 97.56 : x
  2. Step 2: Convert to fraction form
    117/161.30 = 97.56/x
  3. Step 3: Cross multiply
    117x = 161.30 × 97.56
  4. Step 4: Simplify right side
    117x = 15,736.43
  5. Step 5: Solve for x
    x = 15,736.43/117
  6. Step 6: Final answer
    x = 134.50

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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.