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Finding the Fourth Proportional to 147.20, 220.45 and 116.67

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Solution

The fourth proportional to 147.20, 220.45 and 116.67 is: 174.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.20 : 220.45 = 116.67 : x
  2. Step 2: Convert to fraction form
    147.20/220.45 = 116.67/x
  3. Step 3: Cross multiply
    147.20x = 220.45 × 116.67
  4. Step 4: Simplify right side
    147.20x = 25,718.51
  5. Step 5: Solve for x
    x = 25,718.51/147.20
  6. Step 6: Final answer
    x = 174.72

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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.