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Finding the Fourth Proportional to 81,481.43, 112,443.99 and 45,671.43

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Solution

The fourth proportional to 81,481.43, 112,443.99 and 45,671.43 is: 63,026.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,481.43 : 112,443.99 = 45,671.43 : x
  2. Step 2: Convert to fraction form
    81,481.43/112,443.99 = 45,671.43/x
  3. Step 3: Cross multiply
    81,481.43x = 112,443.99 × 45,671.43
  4. Step 4: Simplify right side
    81,481.43x = 5,135,477,818.21
  5. Step 5: Solve for x
    x = 5,135,477,818.21/81,481.43
  6. Step 6: Final answer
    x = 63,026.36

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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.