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Finding the Fourth Proportional to 68,471.70, 102,611.55 and 54,455.70

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Solution

The fourth proportional to 68,471.70, 102,611.55 and 54,455.70 is: 81,607.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,471.70 : 102,611.55 = 54,455.70 : x
  2. Step 2: Convert to fraction form
    68,471.70/102,611.55 = 54,455.70/x
  3. Step 3: Cross multiply
    68,471.70x = 102,611.55 × 54,455.70
  4. Step 4: Simplify right side
    68,471.70x = 5,587,783,783.34
  5. Step 5: Solve for x
    x = 5,587,783,783.34/68,471.70
  6. Step 6: Final answer
    x = 81,607.20

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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.