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Finding the Fourth Proportional to 81,668.24, 112,699.32 and 49,890.32

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Solution

The fourth proportional to 81,668.24, 112,699.32 and 49,890.32 is: 68,846.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,668.24 : 112,699.32 = 49,890.32 : x
  2. Step 2: Convert to fraction form
    81,668.24/112,699.32 = 49,890.32/x
  3. Step 3: Cross multiply
    81,668.24x = 112,699.32 × 49,890.32
  4. Step 4: Simplify right side
    81,668.24x = 5,622,605,138.58
  5. Step 5: Solve for x
    x = 5,622,605,138.58/81,668.24
  6. Step 6: Final answer
    x = 68,846.90

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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.