Home / 80,919,540.30-121,379,310.45-71,566,178.70

Finding the Fourth Proportional to 80,919,540.30, 121,379,310.45 and 71,566,178.70

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Solution

The fourth proportional to 80,919,540.30, 121,379,310.45 and 71,566,178.70 is: 107,349,268.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,919,540.30 : 121,379,310.45 = 71,566,178.70 : x
  2. Step 2: Convert to fraction form
    80,919,540.30/121,379,310.45 = 71,566,178.70/x
  3. Step 3: Cross multiply
    80,919,540.30x = 121,379,310.45 × 71,566,178.70
  4. Step 4: Simplify right side
    80,919,540.30x = 8,686,653,422,147,478
  5. Step 5: Solve for x
    x = 8,686,653,422,147,478/80,919,540.30
  6. Step 6: Final answer
    x = 107,349,268.05

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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.