Home / 139,839.45-192,972.20-81,701.56

Finding the Fourth Proportional to 139,839.45, 192,972.20 and 81,701.56

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Solution

The fourth proportional to 139,839.45, 192,972.20 and 81,701.56 is: 112,744.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,839.45 : 192,972.20 = 81,701.56 : x
  2. Step 2: Convert to fraction form
    139,839.45/192,972.20 = 81,701.56/x
  3. Step 3: Cross multiply
    139,839.45x = 192,972.20 × 81,701.56
  4. Step 4: Simplify right side
    139,839.45x = 15,766,129,776.63
  5. Step 5: Solve for x
    x = 15,766,129,776.63/139,839.45
  6. Step 6: Final answer
    x = 112,744.51

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1.5x scale

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.