Home / 128,504-177,444.96-80,837.12

Finding the Fourth Proportional to 128,504, 177,444.96 and 80,837.12

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Solution

The fourth proportional to 128,504, 177,444.96 and 80,837.12 is: 111,624.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,504 : 177,444.96 = 80,837.12 : x
  2. Step 2: Convert to fraction form
    128,504/177,444.96 = 80,837.12/x
  3. Step 3: Cross multiply
    128,504x = 177,444.96 × 80,837.12
  4. Step 4: Simplify right side
    128,504x = 14,344,139,524.92
  5. Step 5: Solve for x
    x = 14,344,139,524.92/128,504
  6. Step 6: Final answer
    x = 111,624.07

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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.