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Finding the Fourth Proportional to 253,694,012.80, 380,541,019.20 and 132,509,718.40

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Solution

The fourth proportional to 253,694,012.80, 380,541,019.20 and 132,509,718.40 is: 198,764,577.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,694,012.80 : 380,541,019.20 = 132,509,718.40 : x
  2. Step 2: Convert to fraction form
    253,694,012.80/380,541,019.20 = 132,509,718.40/x
  3. Step 3: Cross multiply
    253,694,012.80x = 380,541,019.20 × 132,509,718.40
  4. Step 4: Simplify right side
    253,694,012.80x = 50,425,383,293,840,992
  5. Step 5: Solve for x
    x = 50,425,383,293,840,992/253,694,012.80
  6. Step 6: Final answer
    x = 198,764,577.60

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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.