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Finding the Fourth Proportional to 68,725.99, 103,092.90 and 21,345.58

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Solution

The fourth proportional to 68,725.99, 103,092.90 and 21,345.58 is: 32,019.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,725.99 : 103,092.90 = 21,345.58 : x
  2. Step 2: Convert to fraction form
    68,725.99/103,092.90 = 21,345.58/x
  3. Step 3: Cross multiply
    68,725.99x = 103,092.90 × 21,345.58
  4. Step 4: Simplify right side
    68,725.99x = 2,200,577,744.38
  5. Step 5: Solve for x
    x = 2,200,577,744.38/68,725.99
  6. Step 6: Final answer
    x = 32,019.59

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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.