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Finding the Fourth Proportional to 145.40, 199.46 and 142.97

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Solution

The fourth proportional to 145.40, 199.46 and 142.97 is: 196.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.40 : 199.46 = 142.97 : x
  2. Step 2: Convert to fraction form
    145.40/199.46 = 142.97/x
  3. Step 3: Cross multiply
    145.40x = 199.46 × 142.97
  4. Step 4: Simplify right side
    145.40x = 28,516.16
  5. Step 5: Solve for x
    x = 28,516.16/145.40
  6. Step 6: Final answer
    x = 196.13

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.