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Finding the Fourth Proportional to 104.63, 157.51 and 74.42

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Solution

The fourth proportional to 104.63, 157.51 and 74.42 is: 112.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.63 : 157.51 = 74.42 : x
  2. Step 2: Convert to fraction form
    104.63/157.51 = 74.42/x
  3. Step 3: Cross multiply
    104.63x = 157.51 × 74.42
  4. Step 4: Simplify right side
    104.63x = 11,720.92
  5. Step 5: Solve for x
    x = 11,720.92/104.63
  6. Step 6: Final answer
    x = 112.02

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.