Home / 90,857,816.70-136,286,725.05-81,787,890.30

Finding the Fourth Proportional to 90,857,816.70, 136,286,725.05 and 81,787,890.30

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Solution

The fourth proportional to 90,857,816.70, 136,286,725.05 and 81,787,890.30 is: 122,681,835.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,857,816.70 : 136,286,725.05 = 81,787,890.30 : x
  2. Step 2: Convert to fraction form
    90,857,816.70/136,286,725.05 = 81,787,890.30/x
  3. Step 3: Cross multiply
    90,857,816.70x = 136,286,725.05 × 81,787,890.30
  4. Step 4: Simplify right side
    90,857,816.70x = 11,146,603,717,735,662
  5. Step 5: Solve for x
    x = 11,146,603,717,735,662/90,857,816.70
  6. Step 6: Final answer
    x = 122,681,835.45

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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.