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Finding the Fourth Proportional to 74,761.77, 103,148.43 and 42,493.97

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Solution

The fourth proportional to 74,761.77, 103,148.43 and 42,493.97 is: 58,628.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,761.77 : 103,148.43 = 42,493.97 : x
  2. Step 2: Convert to fraction form
    74,761.77/103,148.43 = 42,493.97/x
  3. Step 3: Cross multiply
    74,761.77x = 103,148.43 × 42,493.97
  4. Step 4: Simplify right side
    74,761.77x = 4,383,185,774.22
  5. Step 5: Solve for x
    x = 4,383,185,774.22/74,761.77
  6. Step 6: Final answer
    x = 58,628.71

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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.