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Finding the Fourth Proportional to 68,669.71, 103,007.23 and 21,289.66

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Solution

The fourth proportional to 68,669.71, 103,007.23 and 21,289.66 is: 31,935.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,669.71 : 103,007.23 = 21,289.66 : x
  2. Step 2: Convert to fraction form
    68,669.71/103,007.23 = 21,289.66/x
  3. Step 3: Cross multiply
    68,669.71x = 103,007.23 × 21,289.66
  4. Step 4: Simplify right side
    68,669.71x = 2,192,988,593.50
  5. Step 5: Solve for x
    x = 2,192,988,593.50/68,669.71
  6. Step 6: Final answer
    x = 31,935.31

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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.