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Finding the Fourth Proportional to 139,552.42, 192,625.52 and 103,790.87

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Solution

The fourth proportional to 139,552.42, 192,625.52 and 103,790.87 is: 143,263.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,552.42 : 192,625.52 = 103,790.87 : x
  2. Step 2: Convert to fraction form
    139,552.42/192,625.52 = 103,790.87/x
  3. Step 3: Cross multiply
    139,552.42x = 192,625.52 × 103,790.87
  4. Step 4: Simplify right side
    139,552.42x = 19,992,770,305.00
  5. Step 5: Solve for x
    x = 19,992,770,305.00/139,552.42
  6. Step 6: Final answer
    x = 143,263.52

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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.