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Finding the Fourth Proportional to 68,325.43, 102,490.89 and 21,578.32

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Solution

The fourth proportional to 68,325.43, 102,490.89 and 21,578.32 is: 32,368.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,325.43 : 102,490.89 = 21,578.32 : x
  2. Step 2: Convert to fraction form
    68,325.43/102,490.89 = 21,578.32/x
  3. Step 3: Cross multiply
    68,325.43x = 102,490.89 × 21,578.32
  4. Step 4: Simplify right side
    68,325.43x = 2,211,581,221.50
  5. Step 5: Solve for x
    x = 2,211,581,221.50/68,325.43
  6. Step 6: Final answer
    x = 32,368.35

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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.