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Finding the Fourth Proportional to 68,079.34, 93,942.90 and 39,393.27

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Solution

The fourth proportional to 68,079.34, 93,942.90 and 39,393.27 is: 54,358.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,079.34 : 93,942.90 = 39,393.27 : x
  2. Step 2: Convert to fraction form
    68,079.34/93,942.90 = 39,393.27/x
  3. Step 3: Cross multiply
    68,079.34x = 93,942.90 × 39,393.27
  4. Step 4: Simplify right side
    68,079.34x = 3,700,718,476.00
  5. Step 5: Solve for x
    x = 3,700,718,476.00/68,079.34
  6. Step 6: Final answer
    x = 54,358.91

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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.