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Finding the Fourth Proportional to 139,540.40, 209,310.60 and 127,730.60

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Solution

The fourth proportional to 139,540.40, 209,310.60 and 127,730.60 is: 191,595.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,540.40 : 209,310.60 = 127,730.60 : x
  2. Step 2: Convert to fraction form
    139,540.40/209,310.60 = 127,730.60/x
  3. Step 3: Cross multiply
    139,540.40x = 209,310.60 × 127,730.60
  4. Step 4: Simplify right side
    139,540.40x = 26,735,368,524.36
  5. Step 5: Solve for x
    x = 26,735,368,524.36/139,540.40
  6. Step 6: Final answer
    x = 191,595.90

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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.