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Finding the Fourth Proportional to 80,435.60, 120,696.60 and 33,693.20

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Solution

The fourth proportional to 80,435.60, 120,696.60 and 33,693.20 is: 50,557.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,435.60 : 120,696.60 = 33,693.20 : x
  2. Step 2: Convert to fraction form
    80,435.60/120,696.60 = 33,693.20/x
  3. Step 3: Cross multiply
    80,435.60x = 120,696.60 × 33,693.20
  4. Step 4: Simplify right side
    80,435.60x = 4,066,654,683.12
  5. Step 5: Solve for x
    x = 4,066,654,683.12/80,435.60
  6. Step 6: Final answer
    x = 50,557.90

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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.