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Finding the Fourth Proportional to 72,028.20, 107,912.70 and 61,660.20

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Solution

The fourth proportional to 72,028.20, 107,912.70 and 61,660.20 is: 92,379.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,028.20 : 107,912.70 = 61,660.20 : x
  2. Step 2: Convert to fraction form
    72,028.20/107,912.70 = 61,660.20/x
  3. Step 3: Cross multiply
    72,028.20x = 107,912.70 × 61,660.20
  4. Step 4: Simplify right side
    72,028.20x = 6,653,918,664.54
  5. Step 5: Solve for x
    x = 6,653,918,664.54/72,028.20
  6. Step 6: Final answer
    x = 92,379.36

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1.5x scale

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.