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Finding the Fourth Proportional to 151.12, 208.48 and 92.88

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Solution

The fourth proportional to 151.12, 208.48 and 92.88 is: 128.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.12 : 208.48 = 92.88 : x
  2. Step 2: Convert to fraction form
    151.12/208.48 = 92.88/x
  3. Step 3: Cross multiply
    151.12x = 208.48 × 92.88
  4. Step 4: Simplify right side
    151.12x = 19,363.62
  5. Step 5: Solve for x
    x = 19,363.62/151.12
  6. Step 6: Final answer
    x = 128.13

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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.