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Finding the Fourth Proportional to 68,529, 102,240.65 and 61,049.46

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Solution

The fourth proportional to 68,529, 102,240.65 and 61,049.46 is: 91,081.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,529 : 102,240.65 = 61,049.46 : x
  2. Step 2: Convert to fraction form
    68,529/102,240.65 = 61,049.46/x
  3. Step 3: Cross multiply
    68,529x = 102,240.65 × 61,049.46
  4. Step 4: Simplify right side
    68,529x = 6,241,736,472.55
  5. Step 5: Solve for x
    x = 6,241,736,472.55/68,529
  6. Step 6: Final answer
    x = 91,081.68

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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.