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Finding the Fourth Proportional to 68,670.41, 103,021.67 and 21,283.02

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Solution

The fourth proportional to 68,670.41, 103,021.67 and 21,283.02 is: 31,929.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,670.41 : 103,021.67 = 21,283.02 : x
  2. Step 2: Convert to fraction form
    68,670.41/103,021.67 = 21,283.02/x
  3. Step 3: Cross multiply
    68,670.41x = 103,021.67 × 21,283.02
  4. Step 4: Simplify right side
    68,670.41x = 2,192,612,316.25
  5. Step 5: Solve for x
    x = 2,192,612,316.25/68,670.41
  6. Step 6: Final answer
    x = 31,929.51

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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.