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Finding the Fourth Proportional to 68,908.41, 103,366.71 and 21,530.34

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Solution

The fourth proportional to 68,908.41, 103,366.71 and 21,530.34 is: 32,296.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,908.41 : 103,366.71 = 21,530.34 : x
  2. Step 2: Convert to fraction form
    68,908.41/103,366.71 = 21,530.34/x
  3. Step 3: Cross multiply
    68,908.41x = 103,366.71 × 21,530.34
  4. Step 4: Simplify right side
    68,908.41x = 2,225,520,410.98
  5. Step 5: Solve for x
    x = 2,225,520,410.98/68,908.41
  6. Step 6: Final answer
    x = 32,296.79

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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.