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Finding the Fourth Proportional to 66,138.84, 99,176.94 and 25,631.31

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Solution

The fourth proportional to 66,138.84, 99,176.94 and 25,631.31 is: 38,434.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,138.84 : 99,176.94 = 25,631.31 : x
  2. Step 2: Convert to fraction form
    66,138.84/99,176.94 = 25,631.31/x
  3. Step 3: Cross multiply
    66,138.84x = 99,176.94 × 25,631.31
  4. Step 4: Simplify right side
    66,138.84x = 2,542,034,893.99
  5. Step 5: Solve for x
    x = 2,542,034,893.99/66,138.84
  6. Step 6: Final answer
    x = 38,434.83

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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.