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Finding the Fourth Proportional to 148.06, 221.83 and 90.15

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Solution

The fourth proportional to 148.06, 221.83 and 90.15 is: 135.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.06 : 221.83 = 90.15 : x
  2. Step 2: Convert to fraction form
    148.06/221.83 = 90.15/x
  3. Step 3: Cross multiply
    148.06x = 221.83 × 90.15
  4. Step 4: Simplify right side
    148.06x = 19,997.97
  5. Step 5: Solve for x
    x = 19,997.97/148.06
  6. Step 6: Final answer
    x = 135.07

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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.