Home / 128,414.06-177,201.78-71,814.50

Finding the Fourth Proportional to 128,414.06, 177,201.78 and 71,814.50

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Solution

The fourth proportional to 128,414.06, 177,201.78 and 71,814.50 is: 99,098.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,414.06 : 177,201.78 = 71,814.50 : x
  2. Step 2: Convert to fraction form
    128,414.06/177,201.78 = 71,814.50/x
  3. Step 3: Cross multiply
    128,414.06x = 177,201.78 × 71,814.50
  4. Step 4: Simplify right side
    128,414.06x = 12,725,657,229.81
  5. Step 5: Solve for x
    x = 12,725,657,229.81/128,414.06
  6. Step 6: Final answer
    x = 99,098.63

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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.