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Finding the Fourth Proportional to 66,279.99, 99,409.24 and 21,299.22

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Solution

The fourth proportional to 66,279.99, 99,409.24 and 21,299.22 is: 31,945.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,279.99 : 99,409.24 = 21,299.22 : x
  2. Step 2: Convert to fraction form
    66,279.99/99,409.24 = 21,299.22/x
  3. Step 3: Cross multiply
    66,279.99x = 99,409.24 × 21,299.22
  4. Step 4: Simplify right side
    66,279.99x = 2,117,339,272.79
  5. Step 5: Solve for x
    x = 2,117,339,272.79/66,279.99
  6. Step 6: Final answer
    x = 31,945.38

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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.