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Finding the Fourth Proportional to 104.26, 157.18 and 98.68

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Solution

The fourth proportional to 104.26, 157.18 and 98.68 is: 148.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.26 : 157.18 = 98.68 : x
  2. Step 2: Convert to fraction form
    104.26/157.18 = 98.68/x
  3. Step 3: Cross multiply
    104.26x = 157.18 × 98.68
  4. Step 4: Simplify right side
    104.26x = 15,509.88
  5. Step 5: Solve for x
    x = 15,509.88/104.26
  6. Step 6: Final answer
    x = 148.77

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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.