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Finding the Fourth Proportional to 150.91, 207.94 and 142.74

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Solution

The fourth proportional to 150.91, 207.94 and 142.74 is: 196.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.91 : 207.94 = 142.74 : x
  2. Step 2: Convert to fraction form
    150.91/207.94 = 142.74/x
  3. Step 3: Cross multiply
    150.91x = 207.94 × 142.74
  4. Step 4: Simplify right side
    150.91x = 29,681.08
  5. Step 5: Solve for x
    x = 29,681.08/150.91
  6. Step 6: Final answer
    x = 196.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.