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Finding the Fourth Proportional to 104.55, 156.65 and 72.33

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Solution

The fourth proportional to 104.55, 156.65 and 72.33 is: 108.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.55 : 156.65 = 72.33 : x
  2. Step 2: Convert to fraction form
    104.55/156.65 = 72.33/x
  3. Step 3: Cross multiply
    104.55x = 156.65 × 72.33
  4. Step 4: Simplify right side
    104.55x = 11,330.13
  5. Step 5: Solve for x
    x = 11,330.13/104.55
  6. Step 6: Final answer
    x = 108.37

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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.