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Finding the Fourth Proportional to 75.60, 104.32 and 61.04

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Solution

The fourth proportional to 75.60, 104.32 and 61.04 is: 84.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.60 : 104.32 = 61.04 : x
  2. Step 2: Convert to fraction form
    75.60/104.32 = 61.04/x
  3. Step 3: Cross multiply
    75.60x = 104.32 × 61.04
  4. Step 4: Simplify right side
    75.60x = 6,367.69
  5. Step 5: Solve for x
    x = 6,367.69/75.60
  6. Step 6: Final answer
    x = 84.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.