Home / 81,238.51-121,869.40-25,083.41

Finding the Fourth Proportional to 81,238.51, 121,869.40 and 25,083.41

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Solution

The fourth proportional to 81,238.51, 121,869.40 and 25,083.41 is: 37,628.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,238.51 : 121,869.40 = 25,083.41 : x
  2. Step 2: Convert to fraction form
    81,238.51/121,869.40 = 25,083.41/x
  3. Step 3: Cross multiply
    81,238.51x = 121,869.40 × 25,083.41
  4. Step 4: Simplify right side
    81,238.51x = 3,056,899,980.49
  5. Step 5: Solve for x
    x = 3,056,899,980.49/81,238.51
  6. Step 6: Final answer
    x = 37,628.71

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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.