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Finding the Fourth Proportional to 150.79, 207.35 and 128.92

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Solution

The fourth proportional to 150.79, 207.35 and 128.92 is: 177.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.79 : 207.35 = 128.92 : x
  2. Step 2: Convert to fraction form
    150.79/207.35 = 128.92/x
  3. Step 3: Cross multiply
    150.79x = 207.35 × 128.92
  4. Step 4: Simplify right side
    150.79x = 26,730.92
  5. Step 5: Solve for x
    x = 26,730.92/150.79
  6. Step 6: Final answer
    x = 177.27

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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.