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Finding the Fourth Proportional to 139,720.86, 209,516.96 and 44,933.52

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Solution

The fourth proportional to 139,720.86, 209,516.96 and 44,933.52 is: 67,379.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,720.86 : 209,516.96 = 44,933.52 : x
  2. Step 2: Convert to fraction form
    139,720.86/209,516.96 = 44,933.52/x
  3. Step 3: Cross multiply
    139,720.86x = 209,516.96 × 44,933.52
  4. Step 4: Simplify right side
    139,720.86x = 9,414,334,287.83
  5. Step 5: Solve for x
    x = 9,414,334,287.83/139,720.86
  6. Step 6: Final answer
    x = 67,379.59

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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.