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Finding the Fourth Proportional to 103.98, 141.67 and 101.76

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Solution

The fourth proportional to 103.98, 141.67 and 101.76 is: 138.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.98 : 141.67 = 101.76 : x
  2. Step 2: Convert to fraction form
    103.98/141.67 = 101.76/x
  3. Step 3: Cross multiply
    103.98x = 141.67 × 101.76
  4. Step 4: Simplify right side
    103.98x = 14,416.34
  5. Step 5: Solve for x
    x = 14,416.34/103.98
  6. Step 6: Final answer
    x = 138.65

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.