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Finding the Fourth Proportional to 75.55, 113.11 and 72.94

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Solution

The fourth proportional to 75.55, 113.11 and 72.94 is: 109.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.55 : 113.11 = 72.94 : x
  2. Step 2: Convert to fraction form
    75.55/113.11 = 72.94/x
  3. Step 3: Cross multiply
    75.55x = 113.11 × 72.94
  4. Step 4: Simplify right side
    75.55x = 8,250.24
  5. Step 5: Solve for x
    x = 8,250.24/75.55
  6. Step 6: Final answer
    x = 109.20

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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.