Home / 138,974,968.20-208,320,734.70-81,437,622.60

Finding the Fourth Proportional to 138,974,968.20, 208,320,734.70 and 81,437,622.60

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Solution

The fourth proportional to 138,974,968.20, 208,320,734.70 and 81,437,622.60 is: 122,073,389.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,974,968.20 : 208,320,734.70 = 81,437,622.60 : x
  2. Step 2: Convert to fraction form
    138,974,968.20/208,320,734.70 = 81,437,622.60/x
  3. Step 3: Cross multiply
    138,974,968.20x = 208,320,734.70 × 81,437,622.60
  4. Step 4: Simplify right side
    138,974,968.20x = 16,965,145,372,253,322
  5. Step 5: Solve for x
    x = 16,965,145,372,253,322/138,974,968.20
  6. Step 6: Final answer
    x = 122,073,389.13

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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.