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Finding the Fourth Proportional to 28,220,793.90, 42,331,190.85 and 28,220,793.90

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Solution

The fourth proportional to 28,220,793.90, 42,331,190.85 and 28,220,793.90 is: 42,331,190.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,220,793.90 : 42,331,190.85 = 28,220,793.90 : x
  2. Step 2: Convert to fraction form
    28,220,793.90/42,331,190.85 = 28,220,793.90/x
  3. Step 3: Cross multiply
    28,220,793.90x = 42,331,190.85 × 28,220,793.90
  4. Step 4: Simplify right side
    28,220,793.90x = 1,194,619,812,519,415.75
  5. Step 5: Solve for x
    x = 1,194,619,812,519,415.75/28,220,793.90
  6. Step 6: Final answer
    x = 42,331,190.85

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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.