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Finding the Fourth Proportional to 103.38, 143.34 and 101.40

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Solution

The fourth proportional to 103.38, 143.34 and 101.40 is: 140.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.38 : 143.34 = 101.40 : x
  2. Step 2: Convert to fraction form
    103.38/143.34 = 101.40/x
  3. Step 3: Cross multiply
    103.38x = 143.34 × 101.40
  4. Step 4: Simplify right side
    103.38x = 14,534.68
  5. Step 5: Solve for x
    x = 14,534.68/103.38
  6. Step 6: Final answer
    x = 140.59

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.