Home / 68,074.26-102,115.02-21,330.78

Finding the Fourth Proportional to 68,074.26, 102,115.02 and 21,330.78

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Solution

The fourth proportional to 68,074.26, 102,115.02 and 21,330.78 is: 31,997.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,074.26 : 102,115.02 = 21,330.78 : x
  2. Step 2: Convert to fraction form
    68,074.26/102,115.02 = 21,330.78/x
  3. Step 3: Cross multiply
    68,074.26x = 102,115.02 × 21,330.78
  4. Step 4: Simplify right side
    68,074.26x = 2,178,193,026.32
  5. Step 5: Solve for x
    x = 2,178,193,026.32/68,074.26
  6. Step 6: Final answer
    x = 31,997.31

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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.