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Finding the Fourth Proportional to 139,531.80, 209,171.11 and 50,722.58

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Solution

The fourth proportional to 139,531.80, 209,171.11 and 50,722.58 is: 76,037.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,531.80 : 209,171.11 = 50,722.58 : x
  2. Step 2: Convert to fraction form
    139,531.80/209,171.11 = 50,722.58/x
  3. Step 3: Cross multiply
    139,531.80x = 209,171.11 × 50,722.58
  4. Step 4: Simplify right side
    139,531.80x = 10,609,698,360.66
  5. Step 5: Solve for x
    x = 10,609,698,360.66/139,531.80
  6. Step 6: Final answer
    x = 76,037.85

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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.