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Finding the Fourth Proportional to 45,581, 68,351.36 and 20,620.04

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Solution

The fourth proportional to 45,581, 68,351.36 and 20,620.04 is: 30,920.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,581 : 68,351.36 = 20,620.04 : x
  2. Step 2: Convert to fraction form
    45,581/68,351.36 = 20,620.04/x
  3. Step 3: Cross multiply
    45,581x = 68,351.36 × 20,620.04
  4. Step 4: Simplify right side
    45,581x = 1,409,407,777.25
  5. Step 5: Solve for x
    x = 1,409,407,777.25/45,581
  6. Step 6: Final answer
    x = 30,920.95

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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.