Home / 138,819,651.20-208,087,759.20-81,282,305.60

Finding the Fourth Proportional to 138,819,651.20, 208,087,759.20 and 81,282,305.60

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Solution

The fourth proportional to 138,819,651.20, 208,087,759.20 and 81,282,305.60 is: 121,840,479.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,819,651.20 : 208,087,759.20 = 81,282,305.60 : x
  2. Step 2: Convert to fraction form
    138,819,651.20/208,087,759.20 = 81,282,305.60/x
  3. Step 3: Cross multiply
    138,819,651.20x = 208,087,759.20 × 81,282,305.60
  4. Step 4: Simplify right side
    138,819,651.20x = 16,913,852,834,913,610
  5. Step 5: Solve for x
    x = 16,913,852,834,913,610/138,819,651.20
  6. Step 6: Final answer
    x = 121,840,479.27

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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.