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Finding the Fourth Proportional to 72.12, 108.13 and 23.35

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Solution

The fourth proportional to 72.12, 108.13 and 23.35 is: 35.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.12 : 108.13 = 23.35 : x
  2. Step 2: Convert to fraction form
    72.12/108.13 = 23.35/x
  3. Step 3: Cross multiply
    72.12x = 108.13 × 23.35
  4. Step 4: Simplify right side
    72.12x = 2,524.51
  5. Step 5: Solve for x
    x = 2,524.51/72.12
  6. Step 6: Final answer
    x = 35.00

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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.