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Finding the Fourth Proportional to 139,993.95, 209,842.38 and 68,816.19

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Solution

The fourth proportional to 139,993.95, 209,842.38 and 68,816.19 is: 103,151.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,993.95 : 209,842.38 = 68,816.19 : x
  2. Step 2: Convert to fraction form
    139,993.95/209,842.38 = 68,816.19/x
  3. Step 3: Cross multiply
    139,993.95x = 209,842.38 × 68,816.19
  4. Step 4: Simplify right side
    139,993.95x = 14,440,553,092.13
  5. Step 5: Solve for x
    x = 14,440,553,092.13/139,993.95
  6. Step 6: Final answer
    x = 103,151.27

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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.