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Finding the Fourth Proportional to 164.86, 247.15 and 72.32

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Solution

The fourth proportional to 164.86, 247.15 and 72.32 is: 108.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.86 : 247.15 = 72.32 : x
  2. Step 2: Convert to fraction form
    164.86/247.15 = 72.32/x
  3. Step 3: Cross multiply
    164.86x = 247.15 × 72.32
  4. Step 4: Simplify right side
    164.86x = 17,873.44
  5. Step 5: Solve for x
    x = 17,873.44/164.86
  6. Step 6: Final answer
    x = 108.42

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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.