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Finding the Fourth Proportional to 68,724.64, 94,826 and 38,910.88

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Solution

The fourth proportional to 68,724.64, 94,826 and 38,910.88 is: 53,689.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,724.64 : 94,826 = 38,910.88 : x
  2. Step 2: Convert to fraction form
    68,724.64/94,826 = 38,910.88/x
  3. Step 3: Cross multiply
    68,724.64x = 94,826 × 38,910.88
  4. Step 4: Simplify right side
    68,724.64x = 3,689,763,106.88
  5. Step 5: Solve for x
    x = 3,689,763,106.88/68,724.64
  6. Step 6: Final answer
    x = 53,689.09

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1.5x scale

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.