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Finding the Fourth Proportional to 101.51, 151.93 and 84.43

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Solution

The fourth proportional to 101.51, 151.93 and 84.43 is: 126.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.51 : 151.93 = 84.43 : x
  2. Step 2: Convert to fraction form
    101.51/151.93 = 84.43/x
  3. Step 3: Cross multiply
    101.51x = 151.93 × 84.43
  4. Step 4: Simplify right side
    101.51x = 12,826.86
  5. Step 5: Solve for x
    x = 12,826.86/101.51
  6. Step 6: Final answer
    x = 126.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.