Home / 139,969,364.70-209,954,047.05-86,147,003.10

Finding the Fourth Proportional to 139,969,364.70, 209,954,047.05 and 86,147,003.10

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Solution

The fourth proportional to 139,969,364.70, 209,954,047.05 and 86,147,003.10 is: 129,220,504.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,364.70 : 209,954,047.05 = 86,147,003.10 : x
  2. Step 2: Convert to fraction form
    139,969,364.70/209,954,047.05 = 86,147,003.10/x
  3. Step 3: Cross multiply
    139,969,364.70x = 209,954,047.05 × 86,147,003.10
  4. Step 4: Simplify right side
    139,969,364.70x = 18,086,911,942,073,896
  5. Step 5: Solve for x
    x = 18,086,911,942,073,896/139,969,364.70
  6. Step 6: Final answer
    x = 129,220,504.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.