Home / 139,969,501.20-209,954,251.80-86,147,139.60

Finding the Fourth Proportional to 139,969,501.20, 209,954,251.80 and 86,147,139.60

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Solution

The fourth proportional to 139,969,501.20, 209,954,251.80 and 86,147,139.60 is: 129,220,709.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,501.20 : 209,954,251.80 = 86,147,139.60 : x
  2. Step 2: Convert to fraction form
    139,969,501.20/209,954,251.80 = 86,147,139.60/x
  3. Step 3: Cross multiply
    139,969,501.20x = 209,954,251.80 × 86,147,139.60
  4. Step 4: Simplify right side
    139,969,501.20x = 18,086,958,239,428,152
  5. Step 5: Solve for x
    x = 18,086,958,239,428,152/139,969,501.20
  6. Step 6: Final answer
    x = 129,220,709.40

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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.