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Finding the Fourth Proportional to 55,159.20, 82,760.40 and 20,102.40

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Solution

The fourth proportional to 55,159.20, 82,760.40 and 20,102.40 is: 30,161.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,159.20 : 82,760.40 = 20,102.40 : x
  2. Step 2: Convert to fraction form
    55,159.20/82,760.40 = 20,102.40/x
  3. Step 3: Cross multiply
    55,159.20x = 82,760.40 × 20,102.40
  4. Step 4: Simplify right side
    55,159.20x = 1,663,682,664.96
  5. Step 5: Solve for x
    x = 1,663,682,664.96/55,159.20
  6. Step 6: Final answer
    x = 30,161.47

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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.