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Finding the Fourth Proportional to 139,348.50, 192,301.29 and 81,989.97

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Solution

The fourth proportional to 139,348.50, 192,301.29 and 81,989.97 is: 113,146.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,348.50 : 192,301.29 = 81,989.97 : x
  2. Step 2: Convert to fraction form
    139,348.50/192,301.29 = 81,989.97/x
  3. Step 3: Cross multiply
    139,348.50x = 192,301.29 × 81,989.97
  4. Step 4: Simplify right side
    139,348.50x = 15,766,776,998.06
  5. Step 5: Solve for x
    x = 15,766,776,998.06/139,348.50
  6. Step 6: Final answer
    x = 113,146.37

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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.