Home / 128,919.83-177,906.60-71,555.81

Finding the Fourth Proportional to 128,919.83, 177,906.60 and 71,555.81

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Solution

The fourth proportional to 128,919.83, 177,906.60 and 71,555.81 is: 98,745.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,919.83 : 177,906.60 = 71,555.81 : x
  2. Step 2: Convert to fraction form
    128,919.83/177,906.60 = 71,555.81/x
  3. Step 3: Cross multiply
    128,919.83x = 177,906.60 × 71,555.81
  4. Step 4: Simplify right side
    128,919.83x = 12,730,250,867.35
  5. Step 5: Solve for x
    x = 12,730,250,867.35/128,919.83
  6. Step 6: Final answer
    x = 98,745.48

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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.