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Finding the Fourth Proportional to 148.01, 203.93 and 121.69

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Solution

The fourth proportional to 148.01, 203.93 and 121.69 is: 167.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.01 : 203.93 = 121.69 : x
  2. Step 2: Convert to fraction form
    148.01/203.93 = 121.69/x
  3. Step 3: Cross multiply
    148.01x = 203.93 × 121.69
  4. Step 4: Simplify right side
    148.01x = 24,816.24
  5. Step 5: Solve for x
    x = 24,816.24/148.01
  6. Step 6: Final answer
    x = 167.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.