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Finding the Fourth Proportional to 79,483.10, 119,224.18 and 20,318.68

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Solution

The fourth proportional to 79,483.10, 119,224.18 and 20,318.68 is: 30,477.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,483.10 : 119,224.18 = 20,318.68 : x
  2. Step 2: Convert to fraction form
    79,483.10/119,224.18 = 20,318.68/x
  3. Step 3: Cross multiply
    79,483.10x = 119,224.18 × 20,318.68
  4. Step 4: Simplify right side
    79,483.10x = 2,422,477,961.68
  5. Step 5: Solve for x
    x = 2,422,477,961.68/79,483.10
  6. Step 6: Final answer
    x = 30,477.90

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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.