Home / 212,752,813.20-319,129,219.80-76,442,643.60

Finding the Fourth Proportional to 212,752,813.20, 319,129,219.80 and 76,442,643.60

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Solution

The fourth proportional to 212,752,813.20, 319,129,219.80 and 76,442,643.60 is: 114,663,965.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,752,813.20 : 319,129,219.80 = 76,442,643.60 : x
  2. Step 2: Convert to fraction form
    212,752,813.20/319,129,219.80 = 76,442,643.60/x
  3. Step 3: Cross multiply
    212,752,813.20x = 319,129,219.80 × 76,442,643.60
  4. Step 4: Simplify right side
    212,752,813.20x = 24,395,081,211,517,464
  5. Step 5: Solve for x
    x = 24,395,081,211,517,464/212,752,813.20
  6. Step 6: Final answer
    x = 114,663,965.40

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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.