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Finding the Fourth Proportional to 68,636.15, 94,715.04 and 39,956.55

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Solution

The fourth proportional to 68,636.15, 94,715.04 and 39,956.55 is: 55,138.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,636.15 : 94,715.04 = 39,956.55 : x
  2. Step 2: Convert to fraction form
    68,636.15/94,715.04 = 39,956.55/x
  3. Step 3: Cross multiply
    68,636.15x = 94,715.04 × 39,956.55
  4. Step 4: Simplify right side
    68,636.15x = 3,784,485,952.29
  5. Step 5: Solve for x
    x = 3,784,485,952.29/68,636.15
  6. Step 6: Final answer
    x = 55,138.38

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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.