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Finding the Fourth Proportional to 68,715.92, 103,072.26 and 21,969.20

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Solution

The fourth proportional to 68,715.92, 103,072.26 and 21,969.20 is: 32,953.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,715.92 : 103,072.26 = 21,969.20 : x
  2. Step 2: Convert to fraction form
    68,715.92/103,072.26 = 21,969.20/x
  3. Step 3: Cross multiply
    68,715.92x = 103,072.26 × 21,969.20
  4. Step 4: Simplify right side
    68,715.92x = 2,264,415,094.39
  5. Step 5: Solve for x
    x = 2,264,415,094.39/68,715.92
  6. Step 6: Final answer
    x = 32,953.28

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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.