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Finding the Fourth Proportional to 68,454.80, 102,672.60 and 21,712.40

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Solution

The fourth proportional to 68,454.80, 102,672.60 and 21,712.40 is: 32,565.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,454.80 : 102,672.60 = 21,712.40 : x
  2. Step 2: Convert to fraction form
    68,454.80/102,672.60 = 21,712.40/x
  3. Step 3: Cross multiply
    68,454.80x = 102,672.60 × 21,712.40
  4. Step 4: Simplify right side
    68,454.80x = 2,229,268,560.24
  5. Step 5: Solve for x
    x = 2,229,268,560.24/68,454.80
  6. Step 6: Final answer
    x = 32,565.56

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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.