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Finding the Fourth Proportional to 104.59, 156.74 and 96.90

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Solution

The fourth proportional to 104.59, 156.74 and 96.90 is: 145.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.59 : 156.74 = 96.90 : x
  2. Step 2: Convert to fraction form
    104.59/156.74 = 96.90/x
  3. Step 3: Cross multiply
    104.59x = 156.74 × 96.90
  4. Step 4: Simplify right side
    104.59x = 15,187.03
  5. Step 5: Solve for x
    x = 15,187.03/104.59
  6. Step 6: Final answer
    x = 145.20

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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.