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Finding the Fourth Proportional to 69,033.92, 103,551.14 and 21,003

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Solution

The fourth proportional to 69,033.92, 103,551.14 and 21,003 is: 31,504.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,033.92 : 103,551.14 = 21,003 : x
  2. Step 2: Convert to fraction form
    69,033.92/103,551.14 = 21,003/x
  3. Step 3: Cross multiply
    69,033.92x = 103,551.14 × 21,003
  4. Step 4: Simplify right side
    69,033.92x = 2,174,884,488.41
  5. Step 5: Solve for x
    x = 2,174,884,488.41/69,033.92
  6. Step 6: Final answer
    x = 31,504.58

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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.