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Finding the Fourth Proportional to 148.86, 223.34 and 90.36

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Solution

The fourth proportional to 148.86, 223.34 and 90.36 is: 135.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.86 : 223.34 = 90.36 : x
  2. Step 2: Convert to fraction form
    148.86/223.34 = 90.36/x
  3. Step 3: Cross multiply
    148.86x = 223.34 × 90.36
  4. Step 4: Simplify right side
    148.86x = 20,180.55
  5. Step 5: Solve for x
    x = 20,180.55/148.86
  6. Step 6: Final answer
    x = 135.57

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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.