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Finding the Fourth Proportional to 68,730.62, 102,920.92 and 45,285.98

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Solution

The fourth proportional to 68,730.62, 102,920.92 and 45,285.98 is: 67,813.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,730.62 : 102,920.92 = 45,285.98 : x
  2. Step 2: Convert to fraction form
    68,730.62/102,920.92 = 45,285.98/x
  3. Step 3: Cross multiply
    68,730.62x = 102,920.92 × 45,285.98
  4. Step 4: Simplify right side
    68,730.62x = 4,660,874,724.70
  5. Step 5: Solve for x
    x = 4,660,874,724.70/68,730.62
  6. Step 6: Final answer
    x = 67,813.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.