Home / 81,780.32-122,644.56-35,020.64

Finding the Fourth Proportional to 81,780.32, 122,644.56 and 35,020.64

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Solution

The fourth proportional to 81,780.32, 122,644.56 and 35,020.64 is: 52,519.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,780.32 : 122,644.56 = 35,020.64 : x
  2. Step 2: Convert to fraction form
    81,780.32/122,644.56 = 35,020.64/x
  3. Step 3: Cross multiply
    81,780.32x = 122,644.56 × 35,020.64
  4. Step 4: Simplify right side
    81,780.32x = 4,295,090,983.72
  5. Step 5: Solve for x
    x = 4,295,090,983.72/81,780.32
  6. Step 6: Final answer
    x = 52,519.86

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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.