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Finding the Fourth Proportional to 139,268.49, 192,348.80 and 93,868.21

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Solution

The fourth proportional to 139,268.49, 192,348.80 and 93,868.21 is: 129,644.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,268.49 : 192,348.80 = 93,868.21 : x
  2. Step 2: Convert to fraction form
    139,268.49/192,348.80 = 93,868.21/x
  3. Step 3: Cross multiply
    139,268.49x = 192,348.80 × 93,868.21
  4. Step 4: Simplify right side
    139,268.49x = 18,055,437,551.65
  5. Step 5: Solve for x
    x = 18,055,437,551.65/139,268.49
  6. Step 6: Final answer
    x = 129,644.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.