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Finding the Fourth Proportional to 74.95, 112.43 and 38.87

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Solution

The fourth proportional to 74.95, 112.43 and 38.87 is: 58.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.95 : 112.43 = 38.87 : x
  2. Step 2: Convert to fraction form
    74.95/112.43 = 38.87/x
  3. Step 3: Cross multiply
    74.95x = 112.43 × 38.87
  4. Step 4: Simplify right side
    74.95x = 4,370.15
  5. Step 5: Solve for x
    x = 4,370.15/74.95
  6. Step 6: Final answer
    x = 58.31

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.