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Finding the Fourth Proportional to 69,828, 96,362.64 and 40,020

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Solution

The fourth proportional to 69,828, 96,362.64 and 40,020 is: 55,227.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,828 : 96,362.64 = 40,020 : x
  2. Step 2: Convert to fraction form
    69,828/96,362.64 = 40,020/x
  3. Step 3: Cross multiply
    69,828x = 96,362.64 × 40,020
  4. Step 4: Simplify right side
    69,828x = 3,856,432,852.80
  5. Step 5: Solve for x
    x = 3,856,432,852.80/69,828
  6. Step 6: Final answer
    x = 55,227.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.