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Finding the Fourth Proportional to 67,764.56, 101,641.95 and 21,016.22

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Solution

The fourth proportional to 67,764.56, 101,641.95 and 21,016.22 is: 31,522.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,764.56 : 101,641.95 = 21,016.22 : x
  2. Step 2: Convert to fraction form
    67,764.56/101,641.95 = 21,016.22/x
  3. Step 3: Cross multiply
    67,764.56x = 101,641.95 × 21,016.22
  4. Step 4: Simplify right side
    67,764.56x = 2,136,129,074.22
  5. Step 5: Solve for x
    x = 2,136,129,074.22/67,764.56
  6. Step 6: Final answer
    x = 31,522.81

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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.