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Finding the Fourth Proportional to 66,625.82, 99,889.32 and 40,324.40

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Solution

The fourth proportional to 66,625.82, 99,889.32 and 40,324.40 is: 60,456.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,625.82 : 99,889.32 = 40,324.40 : x
  2. Step 2: Convert to fraction form
    66,625.82/99,889.32 = 40,324.40/x
  3. Step 3: Cross multiply
    66,625.82x = 99,889.32 × 40,324.40
  4. Step 4: Simplify right side
    66,625.82x = 4,027,976,895.41
  5. Step 5: Solve for x
    x = 4,027,976,895.41/66,625.82
  6. Step 6: Final answer
    x = 60,456.70

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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.