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Finding the Fourth Proportional to 68,699.48, 103,063.94 and 21,313.56

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Solution

The fourth proportional to 68,699.48, 103,063.94 and 21,313.56 is: 31,974.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,699.48 : 103,063.94 = 21,313.56 : x
  2. Step 2: Convert to fraction form
    68,699.48/103,063.94 = 21,313.56/x
  3. Step 3: Cross multiply
    68,699.48x = 103,063.94 × 21,313.56
  4. Step 4: Simplify right side
    68,699.48x = 2,196,658,953.71
  5. Step 5: Solve for x
    x = 2,196,658,953.71/68,699.48
  6. Step 6: Final answer
    x = 31,974.90

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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.