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Finding the Fourth Proportional to 68,071.92, 102,107.88 and 31,110

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Solution

The fourth proportional to 68,071.92, 102,107.88 and 31,110 is: 46,665.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,071.92 : 102,107.88 = 31,110 : x
  2. Step 2: Convert to fraction form
    68,071.92/102,107.88 = 31,110/x
  3. Step 3: Cross multiply
    68,071.92x = 102,107.88 × 31,110
  4. Step 4: Simplify right side
    68,071.92x = 3,176,576,146.80
  5. Step 5: Solve for x
    x = 3,176,576,146.80/68,071.92
  6. Step 6: Final answer
    x = 46,665.00

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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.