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Finding the Fourth Proportional to 139,745.79, 192,849.93 and 76,083.39

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Solution

The fourth proportional to 139,745.79, 192,849.93 and 76,083.39 is: 104,995.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,745.79 : 192,849.93 = 76,083.39 : x
  2. Step 2: Convert to fraction form
    139,745.79/192,849.93 = 76,083.39/x
  3. Step 3: Cross multiply
    139,745.79x = 192,849.93 × 76,083.39
  4. Step 4: Simplify right side
    139,745.79x = 14,672,676,435.66
  5. Step 5: Solve for x
    x = 14,672,676,435.66/139,745.79
  6. Step 6: Final answer
    x = 104,995.48

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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.