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Finding the Fourth Proportional to 68,447.85, 102,672.06 and 21,062.64

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Solution

The fourth proportional to 68,447.85, 102,672.06 and 21,062.64 is: 31,594.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,447.85 : 102,672.06 = 21,062.64 : x
  2. Step 2: Convert to fraction form
    68,447.85/102,672.06 = 21,062.64/x
  3. Step 3: Cross multiply
    68,447.85x = 102,672.06 × 21,062.64
  4. Step 4: Simplify right side
    68,447.85x = 2,162,544,637.84
  5. Step 5: Solve for x
    x = 2,162,544,637.84/68,447.85
  6. Step 6: Final answer
    x = 31,594.05

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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.