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Finding the Fourth Proportional to 148.68, 224.06 and 139.56

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Solution

The fourth proportional to 148.68, 224.06 and 139.56 is: 210.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.68 : 224.06 = 139.56 : x
  2. Step 2: Convert to fraction form
    148.68/224.06 = 139.56/x
  3. Step 3: Cross multiply
    148.68x = 224.06 × 139.56
  4. Step 4: Simplify right side
    148.68x = 31,269.12
  5. Step 5: Solve for x
    x = 31,269.12/148.68
  6. Step 6: Final answer
    x = 210.31

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.