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Finding the Fourth Proportional to 139,373.62, 209,131.93 and 68,294.92

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Solution

The fourth proportional to 139,373.62, 209,131.93 and 68,294.92 is: 102,477.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,373.62 : 209,131.93 = 68,294.92 : x
  2. Step 2: Convert to fraction form
    139,373.62/209,131.93 = 68,294.92/x
  3. Step 3: Cross multiply
    139,373.62x = 209,131.93 × 68,294.92
  4. Step 4: Simplify right side
    139,373.62x = 14,282,647,383.14
  5. Step 5: Solve for x
    x = 14,282,647,383.14/139,373.62
  6. Step 6: Final answer
    x = 102,477.41

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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.