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Finding the Fourth Proportional to 148.08, 222.48 and 139.92

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Solution

The fourth proportional to 148.08, 222.48 and 139.92 is: 210.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.08 : 222.48 = 139.92 : x
  2. Step 2: Convert to fraction form
    148.08/222.48 = 139.92/x
  3. Step 3: Cross multiply
    148.08x = 222.48 × 139.92
  4. Step 4: Simplify right side
    148.08x = 31,129.40
  5. Step 5: Solve for x
    x = 31,129.40/148.08
  6. Step 6: Final answer
    x = 210.22

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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.