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Finding the Fourth Proportional to 145.16, 216.42 and 133.55

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Solution

The fourth proportional to 145.16, 216.42 and 133.55 is: 199.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.16 : 216.42 = 133.55 : x
  2. Step 2: Convert to fraction form
    145.16/216.42 = 133.55/x
  3. Step 3: Cross multiply
    145.16x = 216.42 × 133.55
  4. Step 4: Simplify right side
    145.16x = 28,901.81
  5. Step 5: Solve for x
    x = 28,901.81/145.16
  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.