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Finding the Fourth Proportional to 139,399.97, 209,104.05 and 34,218.95

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Solution

The fourth proportional to 139,399.97, 209,104.05 and 34,218.95 is: 51,329.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,399.97 : 209,104.05 = 34,218.95 : x
  2. Step 2: Convert to fraction form
    139,399.97/209,104.05 = 34,218.95/x
  3. Step 3: Cross multiply
    139,399.97x = 209,104.05 × 34,218.95
  4. Step 4: Simplify right side
    139,399.97x = 7,155,319,986.23
  5. Step 5: Solve for x
    x = 7,155,319,986.23/139,399.97
  6. Step 6: Final answer
    x = 51,329.42

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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.