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Finding the Fourth Proportional to 139,378.57, 192,424.11 and 101,101.37

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Solution

The fourth proportional to 139,378.57, 192,424.11 and 101,101.37 is: 139,579.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,378.57 : 192,424.11 = 101,101.37 : x
  2. Step 2: Convert to fraction form
    139,378.57/192,424.11 = 101,101.37/x
  3. Step 3: Cross multiply
    139,378.57x = 192,424.11 × 101,101.37
  4. Step 4: Simplify right side
    139,378.57x = 19,454,339,800.78
  5. Step 5: Solve for x
    x = 19,454,339,800.78/139,378.57
  6. Step 6: Final answer
    x = 139,579.13

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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.