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Finding the Fourth Proportional to 164.85, 247.10 and 103.91

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Solution

The fourth proportional to 164.85, 247.10 and 103.91 is: 155.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    164.85 : 247.10 = 103.91 : x
  2. Step 2: Convert to fraction form
    164.85/247.10 = 103.91/x
  3. Step 3: Cross multiply
    164.85x = 247.10 × 103.91
  4. Step 4: Simplify right side
    164.85x = 25,674.41
  5. Step 5: Solve for x
    x = 25,674.41/164.85
  6. Step 6: Final answer
    x = 155.74

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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.