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Finding the Fourth Proportional to 68,455.70, 102,687.22 and 21,712.22

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Solution

The fourth proportional to 68,455.70, 102,687.22 and 21,712.22 is: 32,569.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,455.70 : 102,687.22 = 21,712.22 : x
  2. Step 2: Convert to fraction form
    68,455.70/102,687.22 = 21,712.22/x
  3. Step 3: Cross multiply
    68,455.70x = 102,687.22 × 21,712.22
  4. Step 4: Simplify right side
    68,455.70x = 2,229,567,511.83
  5. Step 5: Solve for x
    x = 2,229,567,511.83/68,455.70
  6. Step 6: Final answer
    x = 32,569.49

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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.