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Finding the Fourth Proportional to 81,231.52, 112,083.60 and 47,243.92

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Solution

The fourth proportional to 81,231.52, 112,083.60 and 47,243.92 is: 65,187.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,231.52 : 112,083.60 = 47,243.92 : x
  2. Step 2: Convert to fraction form
    81,231.52/112,083.60 = 47,243.92/x
  3. Step 3: Cross multiply
    81,231.52x = 112,083.60 × 47,243.92
  4. Step 4: Simplify right side
    81,231.52x = 5,295,268,631.71
  5. Step 5: Solve for x
    x = 5,295,268,631.71/81,231.52
  6. Step 6: Final answer
    x = 65,187.36

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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.