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Finding the Fourth Proportional to 208,593.56, 312,786.71 and 66,420.27

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Solution

The fourth proportional to 208,593.56, 312,786.71 and 66,420.27 is: 99,597.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,593.56 : 312,786.71 = 66,420.27 : x
  2. Step 2: Convert to fraction form
    208,593.56/312,786.71 = 66,420.27/x
  3. Step 3: Cross multiply
    208,593.56x = 312,786.71 × 66,420.27
  4. Step 4: Simplify right side
    208,593.56x = 20,775,377,896.66
  5. Step 5: Solve for x
    x = 20,775,377,896.66/208,593.56
  6. Step 6: Final answer
    x = 99,597.41

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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.