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Finding the Fourth Proportional to 42.76, 59.23 and 40.12

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Solution

The fourth proportional to 42.76, 59.23 and 40.12 is: 55.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.76 : 59.23 = 40.12 : x
  2. Step 2: Convert to fraction form
    42.76/59.23 = 40.12/x
  3. Step 3: Cross multiply
    42.76x = 59.23 × 40.12
  4. Step 4: Simplify right side
    42.76x = 2,376.31
  5. Step 5: Solve for x
    x = 2,376.31/42.76
  6. Step 6: Final answer
    x = 55.57

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.