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Finding the Fourth Proportional to 69,002.71, 103,504.07 and 21,618.21

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Solution

The fourth proportional to 69,002.71, 103,504.07 and 21,618.21 is: 32,427.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,002.71 : 103,504.07 = 21,618.21 : x
  2. Step 2: Convert to fraction form
    69,002.71/103,504.07 = 21,618.21/x
  3. Step 3: Cross multiply
    69,002.71x = 103,504.07 × 21,618.21
  4. Step 4: Simplify right side
    69,002.71x = 2,237,572,721.11
  5. Step 5: Solve for x
    x = 2,237,572,721.11/69,002.71
  6. Step 6: Final answer
    x = 32,427.32

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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.