Home / 80,515.21-111,111.45-44,218.21

Finding the Fourth Proportional to 80,515.21, 111,111.45 and 44,218.21

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Solution

The fourth proportional to 80,515.21, 111,111.45 and 44,218.21 is: 61,021.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,515.21 : 111,111.45 = 44,218.21 : x
  2. Step 2: Convert to fraction form
    80,515.21/111,111.45 = 44,218.21/x
  3. Step 3: Cross multiply
    80,515.21x = 111,111.45 × 44,218.21
  4. Step 4: Simplify right side
    80,515.21x = 4,913,149,429.50
  5. Step 5: Solve for x
    x = 4,913,149,429.50/80,515.21
  6. Step 6: Final answer
    x = 61,021.38

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Half scale
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Double scale
Find fourth proportional to 80,516.21, 111,112.83 and 44,219.21
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.