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Finding the Fourth Proportional to 392,787,608.88, 589,160,057.24 and 120,158,375.88

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Solution

The fourth proportional to 392,787,608.88, 589,160,057.24 and 120,158,375.88 is: 180,231,030.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,787,608.88 : 589,160,057.24 = 120,158,375.88 : x
  2. Step 2: Convert to fraction form
    392,787,608.88/589,160,057.24 = 120,158,375.88/x
  3. Step 3: Cross multiply
    392,787,608.88x = 589,160,057.24 × 120,158,375.88
  4. Step 4: Simplify right side
    392,787,608.88x = 70,792,515,611,326,232
  5. Step 5: Solve for x
    x = 70,792,515,611,326,232/392,787,608.88
  6. Step 6: Final answer
    x = 180,231,030.74

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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.