Home / 129,053.25-178,016.26-81,223.56

Finding the Fourth Proportional to 129,053.25, 178,016.26 and 81,223.56

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Solution

The fourth proportional to 129,053.25, 178,016.26 and 81,223.56 is: 112,039.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,053.25 : 178,016.26 = 81,223.56 : x
  2. Step 2: Convert to fraction form
    129,053.25/178,016.26 = 81,223.56/x
  3. Step 3: Cross multiply
    129,053.25x = 178,016.26 × 81,223.56
  4. Step 4: Simplify right side
    129,053.25x = 14,459,114,375.09
  5. Step 5: Solve for x
    x = 14,459,114,375.09/129,053.25
  6. Step 6: Final answer
    x = 112,039.91

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1.5x scale

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.