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Finding the Fourth Proportional to 150.79, 207.61 and 136.39

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Solution

The fourth proportional to 150.79, 207.61 and 136.39 is: 187.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.79 : 207.61 = 136.39 : x
  2. Step 2: Convert to fraction form
    150.79/207.61 = 136.39/x
  3. Step 3: Cross multiply
    150.79x = 207.61 × 136.39
  4. Step 4: Simplify right side
    150.79x = 28,315.93
  5. Step 5: Solve for x
    x = 28,315.93/150.79
  6. Step 6: Final answer
    x = 187.78

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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.