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Finding the Fourth Proportional to 72.94, 109.92 and 65.73

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Solution

The fourth proportional to 72.94, 109.92 and 65.73 is: 99.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.94 : 109.92 = 65.73 : x
  2. Step 2: Convert to fraction form
    72.94/109.92 = 65.73/x
  3. Step 3: Cross multiply
    72.94x = 109.92 × 65.73
  4. Step 4: Simplify right side
    72.94x = 7,225.04
  5. Step 5: Solve for x
    x = 7,225.04/72.94
  6. Step 6: Final answer
    x = 99.05

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.