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Finding the Fourth Proportional to 151.33, 208.72 and 101.51

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Solution

The fourth proportional to 151.33, 208.72 and 101.51 is: 140.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.33 : 208.72 = 101.51 : x
  2. Step 2: Convert to fraction form
    151.33/208.72 = 101.51/x
  3. Step 3: Cross multiply
    151.33x = 208.72 × 101.51
  4. Step 4: Simplify right side
    151.33x = 21,187.17
  5. Step 5: Solve for x
    x = 21,187.17/151.33
  6. Step 6: Final answer
    x = 140.01

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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.