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Finding the Fourth Proportional to 72.87, 109.28 and 24.77

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Solution

The fourth proportional to 72.87, 109.28 and 24.77 is: 37.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.87 : 109.28 = 24.77 : x
  2. Step 2: Convert to fraction form
    72.87/109.28 = 24.77/x
  3. Step 3: Cross multiply
    72.87x = 109.28 × 24.77
  4. Step 4: Simplify right side
    72.87x = 2,706.87
  5. Step 5: Solve for x
    x = 2,706.87/72.87
  6. Step 6: Final answer
    x = 37.15

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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.