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Finding the Fourth Proportional to 150.90, 208.20 and 119.91

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Solution

The fourth proportional to 150.90, 208.20 and 119.91 is: 165.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.90 : 208.20 = 119.91 : x
  2. Step 2: Convert to fraction form
    150.90/208.20 = 119.91/x
  3. Step 3: Cross multiply
    150.90x = 208.20 × 119.91
  4. Step 4: Simplify right side
    150.90x = 24,966.49
  5. Step 5: Solve for x
    x = 24,966.49/150.90
  6. Step 6: Final answer
    x = 165.45

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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.