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Finding the Fourth Proportional to 139,719.94, 192,813.54 and 76,058.21

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Solution

The fourth proportional to 139,719.94, 192,813.54 and 76,058.21 is: 104,960.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,719.94 : 192,813.54 = 76,058.21 : x
  2. Step 2: Convert to fraction form
    139,719.94/192,813.54 = 76,058.21/x
  3. Step 3: Cross multiply
    139,719.94x = 192,813.54 × 76,058.21
  4. Step 4: Simplify right side
    139,719.94x = 14,665,052,716.16
  5. Step 5: Solve for x
    x = 14,665,052,716.16/139,719.94
  6. Step 6: Final answer
    x = 104,960.34

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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.