Home / 90,857,833.20-136,286,749.80-81,787,906.80

Finding the Fourth Proportional to 90,857,833.20, 136,286,749.80 and 81,787,906.80

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Solution

The fourth proportional to 90,857,833.20, 136,286,749.80 and 81,787,906.80 is: 122,681,860.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,857,833.20 : 136,286,749.80 = 81,787,906.80 : x
  2. Step 2: Convert to fraction form
    90,857,833.20/136,286,749.80 = 81,787,906.80/x
  3. Step 3: Cross multiply
    90,857,833.20x = 136,286,749.80 × 81,787,906.80
  4. Step 4: Simplify right side
    90,857,833.20x = 11,146,607,990,717,320
  5. Step 5: Solve for x
    x = 11,146,607,990,717,320/90,857,833.20
  6. Step 6: Final answer
    x = 122,681,860.20

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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.