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Finding the Fourth Proportional to 42.94, 59.42 and 36.79

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Solution

The fourth proportional to 42.94, 59.42 and 36.79 is: 50.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.94 : 59.42 = 36.79 : x
  2. Step 2: Convert to fraction form
    42.94/59.42 = 36.79/x
  3. Step 3: Cross multiply
    42.94x = 59.42 × 36.79
  4. Step 4: Simplify right side
    42.94x = 2,186.06
  5. Step 5: Solve for x
    x = 2,186.06/42.94
  6. Step 6: Final answer
    x = 50.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.