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Finding the Fourth Proportional to 139,169.25, 208,477.40 and 68,833.89

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Solution

The fourth proportional to 139,169.25, 208,477.40 and 68,833.89 is: 103,114.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,169.25 : 208,477.40 = 68,833.89 : x
  2. Step 2: Convert to fraction form
    139,169.25/208,477.40 = 68,833.89/x
  3. Step 3: Cross multiply
    139,169.25x = 208,477.40 × 68,833.89
  4. Step 4: Simplify right side
    139,169.25x = 14,350,310,074.92
  5. Step 5: Solve for x
    x = 14,350,310,074.92/139,169.25
  6. Step 6: Final answer
    x = 103,114.09

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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.