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Finding the Fourth Proportional to 68,921.41, 103,402.87 and 21,534.59

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Solution

The fourth proportional to 68,921.41, 103,402.87 and 21,534.59 is: 32,308.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,921.41 : 103,402.87 = 21,534.59 : x
  2. Step 2: Convert to fraction form
    68,921.41/103,402.87 = 21,534.59/x
  3. Step 3: Cross multiply
    68,921.41x = 103,402.87 × 21,534.59
  4. Step 4: Simplify right side
    68,921.41x = 2,226,738,410.27
  5. Step 5: Solve for x
    x = 2,226,738,410.27/68,921.41
  6. Step 6: Final answer
    x = 32,308.37

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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.