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Finding the Fourth Proportional to 45,489.70, 68,213.82 and 19,180.06

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Solution

The fourth proportional to 45,489.70, 68,213.82 and 19,180.06 is: 28,761.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,489.70 : 68,213.82 = 19,180.06 : x
  2. Step 2: Convert to fraction form
    45,489.70/68,213.82 = 19,180.06/x
  3. Step 3: Cross multiply
    45,489.70x = 68,213.82 × 19,180.06
  4. Step 4: Simplify right side
    45,489.70x = 1,308,345,160.43
  5. Step 5: Solve for x
    x = 1,308,345,160.43/45,489.70
  6. Step 6: Final answer
    x = 28,761.35

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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.