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Finding the Fourth Proportional to 72, 108.02 and 43.08

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Solution

The fourth proportional to 72, 108.02 and 43.08 is: 64.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72 : 108.02 = 43.08 : x
  2. Step 2: Convert to fraction form
    72/108.02 = 43.08/x
  3. Step 3: Cross multiply
    72x = 108.02 × 43.08
  4. Step 4: Simplify right side
    72x = 4,653.50
  5. Step 5: Solve for x
    x = 4,653.50/72
  6. Step 6: Final answer
    x = 64.63

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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.