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Finding the Fourth Proportional to 164.58, 246.91 and 87.49

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Solution

The fourth proportional to 164.58, 246.91 and 87.49 is: 131.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.58 : 246.91 = 87.49 : x
  2. Step 2: Convert to fraction form
    164.58/246.91 = 87.49/x
  3. Step 3: Cross multiply
    164.58x = 246.91 × 87.49
  4. Step 4: Simplify right side
    164.58x = 21,601.72
  5. Step 5: Solve for x
    x = 21,601.72/164.58
  6. Step 6: Final answer
    x = 131.26

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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.