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Finding the Fourth Proportional to 68,604.32, 102,905.36 and 21,856.56

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Solution

The fourth proportional to 68,604.32, 102,905.36 and 21,856.56 is: 32,784.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,604.32 : 102,905.36 = 21,856.56 : x
  2. Step 2: Convert to fraction form
    68,604.32/102,905.36 = 21,856.56/x
  3. Step 3: Cross multiply
    68,604.32x = 102,905.36 × 21,856.56
  4. Step 4: Simplify right side
    68,604.32x = 2,249,157,175.16
  5. Step 5: Solve for x
    x = 2,249,157,175.16/68,604.32
  6. Step 6: Final answer
    x = 32,784.48

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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.