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Finding the Fourth Proportional to 75.39, 113.18 and 48.32

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Solution

The fourth proportional to 75.39, 113.18 and 48.32 is: 72.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.39 : 113.18 = 48.32 : x
  2. Step 2: Convert to fraction form
    75.39/113.18 = 48.32/x
  3. Step 3: Cross multiply
    75.39x = 113.18 × 48.32
  4. Step 4: Simplify right side
    75.39x = 5,468.86
  5. Step 5: Solve for x
    x = 5,468.86/75.39
  6. Step 6: Final answer
    x = 72.54

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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.