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Finding the Fourth Proportional to 79,806.40, 119,709.58 and 20,648.04

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Solution

The fourth proportional to 79,806.40, 119,709.58 and 20,648.04 is: 30,972.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,806.40 : 119,709.58 = 20,648.04 : x
  2. Step 2: Convert to fraction form
    79,806.40/119,709.58 = 20,648.04/x
  3. Step 3: Cross multiply
    79,806.40x = 119,709.58 × 20,648.04
  4. Step 4: Simplify right side
    79,806.40x = 2,471,768,196.22
  5. Step 5: Solve for x
    x = 2,471,768,196.22/79,806.40
  6. Step 6: Final answer
    x = 30,972.05

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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.