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Finding the Fourth Proportional to 73.35, 109.50 and 72.84

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Solution

The fourth proportional to 73.35, 109.50 and 72.84 is: 108.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.35 : 109.50 = 72.84 : x
  2. Step 2: Convert to fraction form
    73.35/109.50 = 72.84/x
  3. Step 3: Cross multiply
    73.35x = 109.50 × 72.84
  4. Step 4: Simplify right side
    73.35x = 7,975.98
  5. Step 5: Solve for x
    x = 7,975.98/73.35
  6. Step 6: Final answer
    x = 108.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.