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Finding the Fourth Proportional to 68,042.97, 102,056.31 and 18,126.72

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Solution

The fourth proportional to 68,042.97, 102,056.31 and 18,126.72 is: 27,187.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,042.97 : 102,056.31 = 18,126.72 : x
  2. Step 2: Convert to fraction form
    68,042.97/102,056.31 = 18,126.72/x
  3. Step 3: Cross multiply
    68,042.97x = 102,056.31 × 18,126.72
  4. Step 4: Simplify right side
    68,042.97x = 1,849,946,155.60
  5. Step 5: Solve for x
    x = 1,849,946,155.60/68,042.97
  6. Step 6: Final answer
    x = 27,187.91

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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.