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Finding the Fourth Proportional to 208,630.92, 312,989.94 and 68,378.52

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Solution

The fourth proportional to 208,630.92, 312,989.94 and 68,378.52 is: 102,582.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,630.92 : 312,989.94 = 68,378.52 : x
  2. Step 2: Convert to fraction form
    208,630.92/312,989.94 = 68,378.52/x
  3. Step 3: Cross multiply
    208,630.92x = 312,989.94 × 68,378.52
  4. Step 4: Simplify right side
    208,630.92x = 21,401,788,872.09
  5. Step 5: Solve for x
    x = 21,401,788,872.09/208,630.92
  6. Step 6: Final answer
    x = 102,582.06

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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.