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Finding the Fourth Proportional to 145.17, 216.42 and 133.56

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Solution

The fourth proportional to 145.17, 216.42 and 133.56 is: 199.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.17 : 216.42 = 133.56 : x
  2. Step 2: Convert to fraction form
    145.17/216.42 = 133.56/x
  3. Step 3: Cross multiply
    145.17x = 216.42 × 133.56
  4. Step 4: Simplify right side
    145.17x = 28,905.06
  5. Step 5: Solve for x
    x = 28,905.06/145.17
  6. Step 6: Final answer
    x = 199.11

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.