Home / 81,031.20-111,820.14-50,832.78

Finding the Fourth Proportional to 81,031.20, 111,820.14 and 50,832.78

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Solution

The fourth proportional to 81,031.20, 111,820.14 and 50,832.78 is: 70,147.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,031.20 : 111,820.14 = 50,832.78 : x
  2. Step 2: Convert to fraction form
    81,031.20/111,820.14 = 50,832.78/x
  3. Step 3: Cross multiply
    81,031.20x = 111,820.14 × 50,832.78
  4. Step 4: Simplify right side
    81,031.20x = 5,684,128,576.19
  5. Step 5: Solve for x
    x = 5,684,128,576.19/81,031.20
  6. Step 6: Final answer
    x = 70,147.41

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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.