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Finding the Fourth Proportional to 74,098.60, 111,143.94 and 20,794.20

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Solution

The fourth proportional to 74,098.60, 111,143.94 and 20,794.20 is: 31,190.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,098.60 : 111,143.94 = 20,794.20 : x
  2. Step 2: Convert to fraction form
    74,098.60/111,143.94 = 20,794.20/x
  3. Step 3: Cross multiply
    74,098.60x = 111,143.94 × 20,794.20
  4. Step 4: Simplify right side
    74,098.60x = 2,311,149,317.15
  5. Step 5: Solve for x
    x = 2,311,149,317.15/74,098.60
  6. Step 6: Final answer
    x = 31,190.19

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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.