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Finding the Fourth Proportional to 104.59, 156.99 and 66.14

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Solution

The fourth proportional to 104.59, 156.99 and 66.14 is: 99.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.59 : 156.99 = 66.14 : x
  2. Step 2: Convert to fraction form
    104.59/156.99 = 66.14/x
  3. Step 3: Cross multiply
    104.59x = 156.99 × 66.14
  4. Step 4: Simplify right side
    104.59x = 10,383.70
  5. Step 5: Solve for x
    x = 10,383.70/104.59
  6. Step 6: Final answer
    x = 99.28

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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.