Home / 128,416.16-177,233.68-78,105.44

Finding the Fourth Proportional to 128,416.16, 177,233.68 and 78,105.44

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Solution

The fourth proportional to 128,416.16, 177,233.68 and 78,105.44 is: 107,797.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,416.16 : 177,233.68 = 78,105.44 : x
  2. Step 2: Convert to fraction form
    128,416.16/177,233.68 = 78,105.44/x
  3. Step 3: Cross multiply
    128,416.16x = 177,233.68 × 78,105.44
  4. Step 4: Simplify right side
    128,416.16x = 13,842,914,559.22
  5. Step 5: Solve for x
    x = 13,842,914,559.22/128,416.16
  6. Step 6: Final answer
    x = 107,797.29

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.