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Finding the Fourth Proportional to 103.34, 143.20 and 102.08

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Solution

The fourth proportional to 103.34, 143.20 and 102.08 is: 141.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.34 : 143.20 = 102.08 : x
  2. Step 2: Convert to fraction form
    103.34/143.20 = 102.08/x
  3. Step 3: Cross multiply
    103.34x = 143.20 × 102.08
  4. Step 4: Simplify right side
    103.34x = 14,617.96
  5. Step 5: Solve for x
    x = 14,617.96/103.34
  6. Step 6: Final answer
    x = 141.45

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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.