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Finding the Fourth Proportional to 164.72, 247.28 and 124.64

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Solution

The fourth proportional to 164.72, 247.28 and 124.64 is: 187.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.72 : 247.28 = 124.64 : x
  2. Step 2: Convert to fraction form
    164.72/247.28 = 124.64/x
  3. Step 3: Cross multiply
    164.72x = 247.28 × 124.64
  4. Step 4: Simplify right side
    164.72x = 30,820.98
  5. Step 5: Solve for x
    x = 30,820.98/164.72
  6. Step 6: Final answer
    x = 187.11

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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.