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Finding the Fourth Proportional to 104.42, 156.62 and 39.42

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Solution

The fourth proportional to 104.42, 156.62 and 39.42 is: 59.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.42 : 156.62 = 39.42 : x
  2. Step 2: Convert to fraction form
    104.42/156.62 = 39.42/x
  3. Step 3: Cross multiply
    104.42x = 156.62 × 39.42
  4. Step 4: Simplify right side
    104.42x = 6,173.96
  5. Step 5: Solve for x
    x = 6,173.96/104.42
  6. Step 6: Final answer
    x = 59.13

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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.