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Finding the Fourth Proportional to 139,345.32, 209,286.90 and 119,399.88

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Solution

The fourth proportional to 139,345.32, 209,286.90 and 119,399.88 is: 179,330.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,345.32 : 209,286.90 = 119,399.88 : x
  2. Step 2: Convert to fraction form
    139,345.32/209,286.90 = 119,399.88/x
  3. Step 3: Cross multiply
    139,345.32x = 209,286.90 × 119,399.88
  4. Step 4: Simplify right side
    139,345.32x = 24,988,830,745.57
  5. Step 5: Solve for x
    x = 24,988,830,745.57/139,345.32
  6. Step 6: Final answer
    x = 179,330.25

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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.