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Finding the Fourth Proportional to 68,501.70, 102,751.64 and 18,586.46

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Solution

The fourth proportional to 68,501.70, 102,751.64 and 18,586.46 is: 27,879.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,501.70 : 102,751.64 = 18,586.46 : x
  2. Step 2: Convert to fraction form
    68,501.70/102,751.64 = 18,586.46/x
  3. Step 3: Cross multiply
    68,501.70x = 102,751.64 × 18,586.46
  4. Step 4: Simplify right side
    68,501.70x = 1,909,789,480.44
  5. Step 5: Solve for x
    x = 1,909,789,480.44/68,501.70
  6. Step 6: Final answer
    x = 27,879.45

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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.