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Finding the Fourth Proportional to 109.93, 151.63 and 66.24

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Solution

The fourth proportional to 109.93, 151.63 and 66.24 is: 91.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.93 : 151.63 = 66.24 : x
  2. Step 2: Convert to fraction form
    109.93/151.63 = 66.24/x
  3. Step 3: Cross multiply
    109.93x = 151.63 × 66.24
  4. Step 4: Simplify right side
    109.93x = 10,043.97
  5. Step 5: Solve for x
    x = 10,043.97/109.93
  6. Step 6: Final answer
    x = 91.37

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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.