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Finding the Fourth Proportional to 55,105.20, 82,679.40 and 20,048.40

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Solution

The fourth proportional to 55,105.20, 82,679.40 and 20,048.40 is: 30,080.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,105.20 : 82,679.40 = 20,048.40 : x
  2. Step 2: Convert to fraction form
    55,105.20/82,679.40 = 20,048.40/x
  3. Step 3: Cross multiply
    55,105.20x = 82,679.40 × 20,048.40
  4. Step 4: Simplify right side
    55,105.20x = 1,657,589,682.96
  5. Step 5: Solve for x
    x = 1,657,589,682.96/55,105.20
  6. Step 6: Final answer
    x = 30,080.46

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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.