Home / 81,243.47-121,830.35-27,940.81

Finding the Fourth Proportional to 81,243.47, 121,830.35 and 27,940.81

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Solution

The fourth proportional to 81,243.47, 121,830.35 and 27,940.81 is: 41,899.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,243.47 : 121,830.35 = 27,940.81 : x
  2. Step 2: Convert to fraction form
    81,243.47/121,830.35 = 27,940.81/x
  3. Step 3: Cross multiply
    81,243.47x = 121,830.35 × 27,940.81
  4. Step 4: Simplify right side
    81,243.47x = 3,404,038,661.58
  5. Step 5: Solve for x
    x = 3,404,038,661.58/81,243.47
  6. Step 6: Final answer
    x = 41,899.23

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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.