Home / 129,642.24-178,920.75-81,893.28

Finding the Fourth Proportional to 129,642.24, 178,920.75 and 81,893.28

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Solution

The fourth proportional to 129,642.24, 178,920.75 and 81,893.28 is: 113,021.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,642.24 : 178,920.75 = 81,893.28 : x
  2. Step 2: Convert to fraction form
    129,642.24/178,920.75 = 81,893.28/x
  3. Step 3: Cross multiply
    129,642.24x = 178,920.75 × 81,893.28
  4. Step 4: Simplify right side
    129,642.24x = 14,652,407,077.56
  5. Step 5: Solve for x
    x = 14,652,407,077.56/129,642.24
  6. Step 6: Final answer
    x = 113,021.86

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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.