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Finding the Fourth Proportional to 56,611.45, 84,917.31 and 19,171.90

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Solution

The fourth proportional to 56,611.45, 84,917.31 and 19,171.90 is: 28,757.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,611.45 : 84,917.31 = 19,171.90 : x
  2. Step 2: Convert to fraction form
    56,611.45/84,917.31 = 19,171.90/x
  3. Step 3: Cross multiply
    56,611.45x = 84,917.31 × 19,171.90
  4. Step 4: Simplify right side
    56,611.45x = 1,628,026,175.59
  5. Step 5: Solve for x
    x = 1,628,026,175.59/56,611.45
  6. Step 6: Final answer
    x = 28,757.90

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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.