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Finding the Fourth Proportional to 139,379.40, 209,077.02 and 39,531.69

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Solution

The fourth proportional to 139,379.40, 209,077.02 and 39,531.69 is: 59,299.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,379.40 : 209,077.02 = 39,531.69 : x
  2. Step 2: Convert to fraction form
    139,379.40/209,077.02 = 39,531.69/x
  3. Step 3: Cross multiply
    139,379.40x = 209,077.02 × 39,531.69
  4. Step 4: Simplify right side
    139,379.40x = 8,265,167,940.76
  5. Step 5: Solve for x
    x = 8,265,167,940.76/139,379.40
  6. Step 6: Final answer
    x = 59,299.78

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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.