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Finding the Fourth Proportional to 164.83, 247.28 and 87.74

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Solution

The fourth proportional to 164.83, 247.28 and 87.74 is: 131.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.83 : 247.28 = 87.74 : x
  2. Step 2: Convert to fraction form
    164.83/247.28 = 87.74/x
  3. Step 3: Cross multiply
    164.83x = 247.28 × 87.74
  4. Step 4: Simplify right side
    164.83x = 21,697.18
  5. Step 5: Solve for x
    x = 21,697.18/164.83
  6. Step 6: Final answer
    x = 131.64

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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.