Home / 138,974,966.20-208,320,731.70-81,437,620.60

Finding the Fourth Proportional to 138,974,966.20, 208,320,731.70 and 81,437,620.60

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Solution

The fourth proportional to 138,974,966.20, 208,320,731.70 and 81,437,620.60 is: 122,073,386.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,974,966.20 : 208,320,731.70 = 81,437,620.60 : x
  2. Step 2: Convert to fraction form
    138,974,966.20/208,320,731.70 = 81,437,620.60/x
  3. Step 3: Cross multiply
    138,974,966.20x = 208,320,731.70 × 81,437,620.60
  4. Step 4: Simplify right side
    138,974,966.20x = 16,965,144,711,298,990
  5. Step 5: Solve for x
    x = 16,965,144,711,298,990/138,974,966.20
  6. Step 6: Final answer
    x = 122,073,386.13

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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.