Home / 90,857,711.70-136,286,567.55-81,787,785.30

Finding the Fourth Proportional to 90,857,711.70, 136,286,567.55 and 81,787,785.30

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Solution

The fourth proportional to 90,857,711.70, 136,286,567.55 and 81,787,785.30 is: 122,681,677.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,857,711.70 : 136,286,567.55 = 81,787,785.30 : x
  2. Step 2: Convert to fraction form
    90,857,711.70/136,286,567.55 = 81,787,785.30/x
  3. Step 3: Cross multiply
    90,857,711.70x = 136,286,567.55 × 81,787,785.30
  4. Step 4: Simplify right side
    90,857,711.70x = 11,146,576,526,053,348
  5. Step 5: Solve for x
    x = 11,146,576,526,053,348/90,857,711.70
  6. Step 6: Final answer
    x = 122,681,677.95

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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.