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Finding the Fourth Proportional to 148.40, 222.36 and 61.66

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Solution

The fourth proportional to 148.40, 222.36 and 61.66 is: 92.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.40 : 222.36 = 61.66 : x
  2. Step 2: Convert to fraction form
    148.40/222.36 = 61.66/x
  3. Step 3: Cross multiply
    148.40x = 222.36 × 61.66
  4. Step 4: Simplify right side
    148.40x = 13,711.11
  5. Step 5: Solve for x
    x = 13,711.11/148.40
  6. Step 6: Final answer
    x = 92.39

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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.