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Finding the Fourth Proportional to 139,396.90, 209,095.52 and 38,195.82

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Solution

The fourth proportional to 139,396.90, 209,095.52 and 38,195.82 is: 57,293.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,396.90 : 209,095.52 = 38,195.82 : x
  2. Step 2: Convert to fraction form
    139,396.90/209,095.52 = 38,195.82/x
  3. Step 3: Cross multiply
    139,396.90x = 209,095.52 × 38,195.82
  4. Step 4: Simplify right side
    139,396.90x = 7,986,574,844.73
  5. Step 5: Solve for x
    x = 7,986,574,844.73/139,396.90
  6. Step 6: Final answer
    x = 57,293.78

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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.