Home / 81,018.12-111,825.02-49,213.68

Finding the Fourth Proportional to 81,018.12, 111,825.02 and 49,213.68

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Solution

The fourth proportional to 81,018.12, 111,825.02 and 49,213.68 is: 67,927.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,018.12 : 111,825.02 = 49,213.68 : x
  2. Step 2: Convert to fraction form
    81,018.12/111,825.02 = 49,213.68/x
  3. Step 3: Cross multiply
    81,018.12x = 111,825.02 × 49,213.68
  4. Step 4: Simplify right side
    81,018.12x = 5,503,320,453.96
  5. Step 5: Solve for x
    x = 5,503,320,453.96/81,018.12
  6. Step 6: Final answer
    x = 67,927.03

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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.