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Finding the Fourth Proportional to 68,554.70, 102,793.83 and 21,156.35

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Solution

The fourth proportional to 68,554.70, 102,793.83 and 21,156.35 is: 31,722.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,554.70 : 102,793.83 = 21,156.35 : x
  2. Step 2: Convert to fraction form
    68,554.70/102,793.83 = 21,156.35/x
  3. Step 3: Cross multiply
    68,554.70x = 102,793.83 × 21,156.35
  4. Step 4: Simplify right side
    68,554.70x = 2,174,742,245.32
  5. Step 5: Solve for x
    x = 2,174,742,245.32/68,554.70
  6. Step 6: Final answer
    x = 31,722.73

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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.