Home / 212,933,878.80-319,400,818.20-91,765,330.80

Finding the Fourth Proportional to 212,933,878.80, 319,400,818.20 and 91,765,330.80

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Solution

The fourth proportional to 212,933,878.80, 319,400,818.20 and 91,765,330.80 is: 137,647,996.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,933,878.80 : 319,400,818.20 = 91,765,330.80 : x
  2. Step 2: Convert to fraction form
    212,933,878.80/319,400,818.20 = 91,765,330.80/x
  3. Step 3: Cross multiply
    212,933,878.80x = 319,400,818.20 × 91,765,330.80
  4. Step 4: Simplify right side
    212,933,878.80x = 29,309,921,739,913,660
  5. Step 5: Solve for x
    x = 29,309,921,739,913,660/212,933,878.80
  6. Step 6: Final answer
    x = 137,647,996.20

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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.