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Finding the Fourth Proportional to 425,627.02, 638,446.83 and 126,137.98

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Solution

The fourth proportional to 425,627.02, 638,446.83 and 126,137.98 is: 189,208.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,627.02 : 638,446.83 = 126,137.98 : x
  2. Step 2: Convert to fraction form
    425,627.02/638,446.83 = 126,137.98/x
  3. Step 3: Cross multiply
    425,627.02x = 638,446.83 × 126,137.98
  4. Step 4: Simplify right side
    425,627.02x = 80,532,393,473.60
  5. Step 5: Solve for x
    x = 80,532,393,473.60/425,627.02
  6. Step 6: Final answer
    x = 189,208.84

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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.