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Finding the Fourth Proportional to 104.59, 156.70 and 61.75

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Solution

The fourth proportional to 104.59, 156.70 and 61.75 is: 92.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.59 : 156.70 = 61.75 : x
  2. Step 2: Convert to fraction form
    104.59/156.70 = 61.75/x
  3. Step 3: Cross multiply
    104.59x = 156.70 × 61.75
  4. Step 4: Simplify right side
    104.59x = 9,676.23
  5. Step 5: Solve for x
    x = 9,676.23/104.59
  6. Step 6: Final answer
    x = 92.52

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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.