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Finding the Fourth Proportional to 151.69, 209.27 and 101.23

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Solution

The fourth proportional to 151.69, 209.27 and 101.23 is: 139.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.69 : 209.27 = 101.23 : x
  2. Step 2: Convert to fraction form
    151.69/209.27 = 101.23/x
  3. Step 3: Cross multiply
    151.69x = 209.27 × 101.23
  4. Step 4: Simplify right side
    151.69x = 21,184.74
  5. Step 5: Solve for x
    x = 21,184.74/151.69
  6. Step 6: Final answer
    x = 139.66

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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.