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Finding the Fourth Proportional to 68,518.34, 102,755.64 and 21,760.28

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Solution

The fourth proportional to 68,518.34, 102,755.64 and 21,760.28 is: 32,633.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,518.34 : 102,755.64 = 21,760.28 : x
  2. Step 2: Convert to fraction form
    68,518.34/102,755.64 = 21,760.28/x
  3. Step 3: Cross multiply
    68,518.34x = 102,755.64 × 21,760.28
  4. Step 4: Simplify right side
    68,518.34x = 2,235,991,497.98
  5. Step 5: Solve for x
    x = 2,235,991,497.98/68,518.34
  6. Step 6: Final answer
    x = 32,633.47

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1.5x scale

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.