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Finding the Fourth Proportional to 68,435.77, 102,653.89 and 21,050.54

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Solution

The fourth proportional to 68,435.77, 102,653.89 and 21,050.54 is: 31,575.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,435.77 : 102,653.89 = 21,050.54 : x
  2. Step 2: Convert to fraction form
    68,435.77/102,653.89 = 21,050.54/x
  3. Step 3: Cross multiply
    68,435.77x = 102,653.89 × 21,050.54
  4. Step 4: Simplify right side
    68,435.77x = 2,160,919,199.08
  5. Step 5: Solve for x
    x = 2,160,919,199.08/68,435.77
  6. Step 6: Final answer
    x = 31,575.88

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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.