Home / 87,828.09-121,272.63-81,111.26

Finding the Fourth Proportional to 87,828.09, 121,272.63 and 81,111.26

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Solution

The fourth proportional to 87,828.09, 121,272.63 and 81,111.26 is: 111,998.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,828.09 : 121,272.63 = 81,111.26 : x
  2. Step 2: Convert to fraction form
    87,828.09/121,272.63 = 81,111.26/x
  3. Step 3: Cross multiply
    87,828.09x = 121,272.63 × 81,111.26
  4. Step 4: Simplify right side
    87,828.09x = 9,836,575,822.81
  5. Step 5: Solve for x
    x = 9,836,575,822.81/87,828.09
  6. Step 6: Final answer
    x = 111,998.06

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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.