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Finding the Fourth Proportional to 72.51, 108.78 and 23.77

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Solution

The fourth proportional to 72.51, 108.78 and 23.77 is: 35.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.51 : 108.78 = 23.77 : x
  2. Step 2: Convert to fraction form
    72.51/108.78 = 23.77/x
  3. Step 3: Cross multiply
    72.51x = 108.78 × 23.77
  4. Step 4: Simplify right side
    72.51x = 2,585.16
  5. Step 5: Solve for x
    x = 2,585.16/72.51
  6. Step 6: Final answer
    x = 35.65

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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.