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Finding the Fourth Proportional to 80,455.40, 120,683.10 and 33,703.40

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Solution

The fourth proportional to 80,455.40, 120,683.10 and 33,703.40 is: 50,555.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,455.40 : 120,683.10 = 33,703.40 : x
  2. Step 2: Convert to fraction form
    80,455.40/120,683.10 = 33,703.40/x
  3. Step 3: Cross multiply
    80,455.40x = 120,683.10 × 33,703.40
  4. Step 4: Simplify right side
    80,455.40x = 4,067,430,792.54
  5. Step 5: Solve for x
    x = 4,067,430,792.54/80,455.40
  6. Step 6: Final answer
    x = 50,555.10

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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.