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Finding the Fourth Proportional to 74.18, 110.50 and 73.91

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Solution

The fourth proportional to 74.18, 110.50 and 73.91 is: 110.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.18 : 110.50 = 73.91 : x
  2. Step 2: Convert to fraction form
    74.18/110.50 = 73.91/x
  3. Step 3: Cross multiply
    74.18x = 110.50 × 73.91
  4. Step 4: Simplify right side
    74.18x = 8,167.15
  5. Step 5: Solve for x
    x = 8,167.15/74.18
  6. Step 6: Final answer
    x = 110.10

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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.