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Finding the Fourth Proportional to 73.78, 110.50 and 37.15

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Solution

The fourth proportional to 73.78, 110.50 and 37.15 is: 55.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.78 : 110.50 = 37.15 : x
  2. Step 2: Convert to fraction form
    73.78/110.50 = 37.15/x
  3. Step 3: Cross multiply
    73.78x = 110.50 × 37.15
  4. Step 4: Simplify right side
    73.78x = 4,104.71
  5. Step 5: Solve for x
    x = 4,104.71/73.78
  6. Step 6: Final answer
    x = 55.64

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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.