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Finding the Fourth Proportional to 139,102.87, 208,669.65 and 44,311

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Solution

The fourth proportional to 139,102.87, 208,669.65 and 44,311 is: 66,471.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,102.87 : 208,669.65 = 44,311 : x
  2. Step 2: Convert to fraction form
    139,102.87/208,669.65 = 44,311/x
  3. Step 3: Cross multiply
    139,102.87x = 208,669.65 × 44,311
  4. Step 4: Simplify right side
    139,102.87x = 9,246,360,861.15
  5. Step 5: Solve for x
    x = 9,246,360,861.15/139,102.87
  6. Step 6: Final answer
    x = 66,471.39

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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.