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Finding the Fourth Proportional to 68,463.10, 102,705.45 and 21,720.70

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Solution

The fourth proportional to 68,463.10, 102,705.45 and 21,720.70 is: 32,584.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,463.10 : 102,705.45 = 21,720.70 : x
  2. Step 2: Convert to fraction form
    68,463.10/102,705.45 = 21,720.70/x
  3. Step 3: Cross multiply
    68,463.10x = 102,705.45 × 21,720.70
  4. Step 4: Simplify right side
    68,463.10x = 2,230,834,267.82
  5. Step 5: Solve for x
    x = 2,230,834,267.82/68,463.10
  6. Step 6: Final answer
    x = 32,584.48

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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.