Home / 87,829.10-121,274.02-81,112.26

Finding the Fourth Proportional to 87,829.10, 121,274.02 and 81,112.26

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Solution

The fourth proportional to 87,829.10, 121,274.02 and 81,112.26 is: 111,999.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,829.10 : 121,274.02 = 81,112.26 : x
  2. Step 2: Convert to fraction form
    87,829.10/121,274.02 = 81,112.26/x
  3. Step 3: Cross multiply
    87,829.10x = 121,274.02 × 81,112.26
  4. Step 4: Simplify right side
    87,829.10x = 9,836,809,841.49
  5. Step 5: Solve for x
    x = 9,836,809,841.49/87,829.10
  6. Step 6: Final answer
    x = 111,999.44

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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.