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Finding the Fourth Proportional to 72.85, 109.30 and 32.30

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Solution

The fourth proportional to 72.85, 109.30 and 32.30 is: 48.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.85 : 109.30 = 32.30 : x
  2. Step 2: Convert to fraction form
    72.85/109.30 = 32.30/x
  3. Step 3: Cross multiply
    72.85x = 109.30 × 32.30
  4. Step 4: Simplify right side
    72.85x = 3,530.23
  5. Step 5: Solve for x
    x = 3,530.23/72.85
  6. Step 6: Final answer
    x = 48.46

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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.