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Finding the Fourth Proportional to 109.86, 164.45 and 58.44

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Solution

The fourth proportional to 109.86, 164.45 and 58.44 is: 87.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.86 : 164.45 = 58.44 : x
  2. Step 2: Convert to fraction form
    109.86/164.45 = 58.44/x
  3. Step 3: Cross multiply
    109.86x = 164.45 × 58.44
  4. Step 4: Simplify right side
    109.86x = 9,610.17
  5. Step 5: Solve for x
    x = 9,610.17/109.86
  6. Step 6: Final answer
    x = 87.48

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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.