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Finding the Fourth Proportional to 72.39, 108.75 and 46.77

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Solution

The fourth proportional to 72.39, 108.75 and 46.77 is: 70.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.39 : 108.75 = 46.77 : x
  2. Step 2: Convert to fraction form
    72.39/108.75 = 46.77/x
  3. Step 3: Cross multiply
    72.39x = 108.75 × 46.77
  4. Step 4: Simplify right side
    72.39x = 5,086.24
  5. Step 5: Solve for x
    x = 5,086.24/72.39
  6. Step 6: Final answer
    x = 70.26

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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.