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Finding the Fourth Proportional to 151.08, 208.62 and 109.68

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Solution

The fourth proportional to 151.08, 208.62 and 109.68 is: 151.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.08 : 208.62 = 109.68 : x
  2. Step 2: Convert to fraction form
    151.08/208.62 = 109.68/x
  3. Step 3: Cross multiply
    151.08x = 208.62 × 109.68
  4. Step 4: Simplify right side
    151.08x = 22,881.44
  5. Step 5: Solve for x
    x = 22,881.44/151.08
  6. Step 6: Final answer
    x = 151.45

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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.