Home / 90,857,728.20-136,286,592.30-81,787,801.80

Finding the Fourth Proportional to 90,857,728.20, 136,286,592.30 and 81,787,801.80

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Solution

The fourth proportional to 90,857,728.20, 136,286,592.30 and 81,787,801.80 is: 122,681,702.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,857,728.20 : 136,286,592.30 = 81,787,801.80 : x
  2. Step 2: Convert to fraction form
    90,857,728.20/136,286,592.30 = 81,787,801.80/x
  3. Step 3: Cross multiply
    90,857,728.20x = 136,286,592.30 × 81,787,801.80
  4. Step 4: Simplify right side
    90,857,728.20x = 11,146,580,799,029,806
  5. Step 5: Solve for x
    x = 11,146,580,799,029,806/90,857,728.20
  6. Step 6: Final answer
    x = 122,681,702.70

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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.