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Finding the Fourth Proportional to 73,611.81, 110,415.38 and 21,021.26

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Solution

The fourth proportional to 73,611.81, 110,415.38 and 21,021.26 is: 31,531.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,611.81 : 110,415.38 = 21,021.26 : x
  2. Step 2: Convert to fraction form
    73,611.81/110,415.38 = 21,021.26/x
  3. Step 3: Cross multiply
    73,611.81x = 110,415.38 × 21,021.26
  4. Step 4: Simplify right side
    73,611.81x = 2,321,069,753.80
  5. Step 5: Solve for x
    x = 2,321,069,753.80/73,611.81
  6. Step 6: Final answer
    x = 31,531.21

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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.