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Finding the Fourth Proportional to 68,776.26, 102,698.69 and 54,576.90

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Solution

The fourth proportional to 68,776.26, 102,698.69 and 54,576.90 is: 81,495.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,776.26 : 102,698.69 = 54,576.90 : x
  2. Step 2: Convert to fraction form
    68,776.26/102,698.69 = 54,576.90/x
  3. Step 3: Cross multiply
    68,776.26x = 102,698.69 × 54,576.90
  4. Step 4: Simplify right side
    68,776.26x = 5,604,975,861.38
  5. Step 5: Solve for x
    x = 5,604,975,861.38/68,776.26
  6. Step 6: Final answer
    x = 81,495.79

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.