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Finding the Fourth Proportional to 147.15, 221.07 and 92.48

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Solution

The fourth proportional to 147.15, 221.07 and 92.48 is: 138.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.15 : 221.07 = 92.48 : x
  2. Step 2: Convert to fraction form
    147.15/221.07 = 92.48/x
  3. Step 3: Cross multiply
    147.15x = 221.07 × 92.48
  4. Step 4: Simplify right side
    147.15x = 20,442.99
  5. Step 5: Solve for x
    x = 20,442.99/147.15
  6. Step 6: Final answer
    x = 138.93

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