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Finding the Fourth Proportional to 104.90, 156.26 and 104.41

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Solution

The fourth proportional to 104.90, 156.26 and 104.41 is: 155.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.90 : 156.26 = 104.41 : x
  2. Step 2: Convert to fraction form
    104.90/156.26 = 104.41/x
  3. Step 3: Cross multiply
    104.90x = 156.26 × 104.41
  4. Step 4: Simplify right side
    104.90x = 16,313.80
  5. Step 5: Solve for x
    x = 16,313.80/104.90
  6. Step 6: Final answer
    x = 155.52

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.