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Finding the Fourth Proportional to 145.96, 219.72 and 133.20

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Solution

The fourth proportional to 145.96, 219.72 and 133.20 is: 200.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.96 : 219.72 = 133.20 : x
  2. Step 2: Convert to fraction form
    145.96/219.72 = 133.20/x
  3. Step 3: Cross multiply
    145.96x = 219.72 × 133.20
  4. Step 4: Simplify right side
    145.96x = 29,266.70
  5. Step 5: Solve for x
    x = 29,266.70/145.96
  6. Step 6: Final answer
    x = 200.51

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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.