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Finding the Fourth Proportional to 132,649,252.80, 198,973,879.20 and 80,780,611.20

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Solution

The fourth proportional to 132,649,252.80, 198,973,879.20 and 80,780,611.20 is: 121,170,916.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,649,252.80 : 198,973,879.20 = 80,780,611.20 : x
  2. Step 2: Convert to fraction form
    132,649,252.80/198,973,879.20 = 80,780,611.20/x
  3. Step 3: Cross multiply
    132,649,252.80x = 198,973,879.20 × 80,780,611.20
  4. Step 4: Simplify right side
    132,649,252.80x = 16,073,231,574,610,966
  5. Step 5: Solve for x
    x = 16,073,231,574,610,966/132,649,252.80
  6. Step 6: Final answer
    x = 121,170,916.80

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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.