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Finding the Fourth Proportional to 104.37, 157.20 and 96.86

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Solution

The fourth proportional to 104.37, 157.20 and 96.86 is: 145.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.37 : 157.20 = 96.86 : x
  2. Step 2: Convert to fraction form
    104.37/157.20 = 96.86/x
  3. Step 3: Cross multiply
    104.37x = 157.20 × 96.86
  4. Step 4: Simplify right side
    104.37x = 15,225.61
  5. Step 5: Solve for x
    x = 15,225.61/104.37
  6. Step 6: Final answer
    x = 145.88

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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.