Home / 139,431.51-192,414.98-79,013.66

Finding the Fourth Proportional to 139,431.51, 192,414.98 and 79,013.66

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Solution

The fourth proportional to 139,431.51, 192,414.98 and 79,013.66 is: 109,038.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,431.51 : 192,414.98 = 79,013.66 : x
  2. Step 2: Convert to fraction form
    139,431.51/192,414.98 = 79,013.66/x
  3. Step 3: Cross multiply
    139,431.51x = 192,414.98 × 79,013.66
  4. Step 4: Simplify right side
    139,431.51x = 15,203,410,451.48
  5. Step 5: Solve for x
    x = 15,203,410,451.48/139,431.51
  6. Step 6: Final answer
    x = 109,038.56

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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.