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Finding the Fourth Proportional to 139,737, 209,418.50 and 68,550.76

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Solution

The fourth proportional to 139,737, 209,418.50 and 68,550.76 is: 102,734.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,737 : 209,418.50 = 68,550.76 : x
  2. Step 2: Convert to fraction form
    139,737/209,418.50 = 68,550.76/x
  3. Step 3: Cross multiply
    139,737x = 209,418.50 × 68,550.76
  4. Step 4: Simplify right side
    139,737x = 14,355,797,333.06
  5. Step 5: Solve for x
    x = 14,355,797,333.06/139,737
  6. Step 6: Final answer
    x = 102,734.40

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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.