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Finding the Fourth Proportional to 103.68, 155.55 and 60.34

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Solution

The fourth proportional to 103.68, 155.55 and 60.34 is: 90.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.68 : 155.55 = 60.34 : x
  2. Step 2: Convert to fraction form
    103.68/155.55 = 60.34/x
  3. Step 3: Cross multiply
    103.68x = 155.55 × 60.34
  4. Step 4: Simplify right side
    103.68x = 9,385.89
  5. Step 5: Solve for x
    x = 9,385.89/103.68
  6. Step 6: Final answer
    x = 90.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.