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Finding the Fourth Proportional to 104.79, 157.44 and 103.88

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Solution

The fourth proportional to 104.79, 157.44 and 103.88 is: 156.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.79 : 157.44 = 103.88 : x
  2. Step 2: Convert to fraction form
    104.79/157.44 = 103.88/x
  3. Step 3: Cross multiply
    104.79x = 157.44 × 103.88
  4. Step 4: Simplify right side
    104.79x = 16,355.65
  5. Step 5: Solve for x
    x = 16,355.65/104.79
  6. Step 6: Final answer
    x = 156.07

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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.