Home / 129,664.40-178,759.32-81,893.84

Finding the Fourth Proportional to 129,664.40, 178,759.32 and 81,893.84

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Solution

The fourth proportional to 129,664.40, 178,759.32 and 81,893.84 is: 112,901.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,664.40 : 178,759.32 = 81,893.84 : x
  2. Step 2: Convert to fraction form
    129,664.40/178,759.32 = 81,893.84/x
  3. Step 3: Cross multiply
    129,664.40x = 178,759.32 × 81,893.84
  4. Step 4: Simplify right side
    129,664.40x = 14,639,287,150.59
  5. Step 5: Solve for x
    x = 14,639,287,150.59/129,664.40
  6. Step 6: Final answer
    x = 112,901.36

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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.