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Finding the Fourth Proportional to 103.17, 141.63 and 88.59

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Solution

The fourth proportional to 103.17, 141.63 and 88.59 is: 121.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.17 : 141.63 = 88.59 : x
  2. Step 2: Convert to fraction form
    103.17/141.63 = 88.59/x
  3. Step 3: Cross multiply
    103.17x = 141.63 × 88.59
  4. Step 4: Simplify right side
    103.17x = 12,546.20
  5. Step 5: Solve for x
    x = 12,546.20/103.17
  6. Step 6: Final answer
    x = 121.61

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.