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Finding the Fourth Proportional to 85.10, 126.99 and 73.67

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Solution

The fourth proportional to 85.10, 126.99 and 73.67 is: 109.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85.10 : 126.99 = 73.67 : x
  2. Step 2: Convert to fraction form
    85.10/126.99 = 73.67/x
  3. Step 3: Cross multiply
    85.10x = 126.99 × 73.67
  4. Step 4: Simplify right side
    85.10x = 9,354.72
  5. Step 5: Solve for x
    x = 9,354.72/85.10
  6. Step 6: Final answer
    x = 109.93

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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.