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Finding the Fourth Proportional to 192,012,959.60, 287,795,490.60 and 76,940,601.20

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Solution

The fourth proportional to 192,012,959.60, 287,795,490.60 and 76,940,601.20 is: 115,321,164.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,012,959.60 : 287,795,490.60 = 76,940,601.20 : x
  2. Step 2: Convert to fraction form
    192,012,959.60/287,795,490.60 = 76,940,601.20/x
  3. Step 3: Cross multiply
    192,012,959.60x = 287,795,490.60 × 76,940,601.20
  4. Step 4: Simplify right side
    192,012,959.60x = 22,143,158,069,412,952
  5. Step 5: Solve for x
    x = 22,143,158,069,412,952/192,012,959.60
  6. Step 6: Final answer
    x = 115,321,164.34

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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.