Home / 81,405.12-122,009.25-41,940.70

Finding the Fourth Proportional to 81,405.12, 122,009.25 and 41,940.70

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Solution

The fourth proportional to 81,405.12, 122,009.25 and 41,940.70 is: 62,860.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,405.12 : 122,009.25 = 41,940.70 : x
  2. Step 2: Convert to fraction form
    81,405.12/122,009.25 = 41,940.70/x
  3. Step 3: Cross multiply
    81,405.12x = 122,009.25 × 41,940.70
  4. Step 4: Simplify right side
    81,405.12x = 5,117,153,351.48
  5. Step 5: Solve for x
    x = 5,117,153,351.48/81,405.12
  6. Step 6: Final answer
    x = 62,860.34

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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.