Home / 91,904,964.10-137,857,446.15-81,860,729.20

Finding the Fourth Proportional to 91,904,964.10, 137,857,446.15 and 81,860,729.20

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Solution

The fourth proportional to 91,904,964.10, 137,857,446.15 and 81,860,729.20 is: 122,791,093.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,904,964.10 : 137,857,446.15 = 81,860,729.20 : x
  2. Step 2: Convert to fraction form
    91,904,964.10/137,857,446.15 = 81,860,729.20/x
  3. Step 3: Cross multiply
    91,904,964.10x = 137,857,446.15 × 81,860,729.20
  4. Step 4: Simplify right side
    91,904,964.10x = 11,285,111,067,488,734
  5. Step 5: Solve for x
    x = 11,285,111,067,488,734/91,904,964.10
  6. Step 6: Final answer
    x = 122,791,093.80

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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.