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Finding the Fourth Proportional to 49,836.50, 74,755.02 and 12,900.50

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Solution

The fourth proportional to 49,836.50, 74,755.02 and 12,900.50 is: 19,350.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,836.50 : 74,755.02 = 12,900.50 : x
  2. Step 2: Convert to fraction form
    49,836.50/74,755.02 = 12,900.50/x
  3. Step 3: Cross multiply
    49,836.50x = 74,755.02 × 12,900.50
  4. Step 4: Simplify right side
    49,836.50x = 964,377,135.51
  5. Step 5: Solve for x
    x = 964,377,135.51/49,836.50
  6. Step 6: Final answer
    x = 19,350.82

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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.