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Finding the Fourth Proportional to 84,676.41, 126,969.21 and 28,497.87

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Solution

The fourth proportional to 84,676.41, 126,969.21 and 28,497.87 is: 42,731.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,676.41 : 126,969.21 = 28,497.87 : x
  2. Step 2: Convert to fraction form
    84,676.41/126,969.21 = 28,497.87/x
  3. Step 3: Cross multiply
    84,676.41x = 126,969.21 × 28,497.87
  4. Step 4: Simplify right side
    84,676.41x = 3,618,352,040.58
  5. Step 5: Solve for x
    x = 3,618,352,040.58/84,676.41
  6. Step 6: Final answer
    x = 42,731.52

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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.