Home / 128,334.21-177,101.60-71,745.59

Finding the Fourth Proportional to 128,334.21, 177,101.60 and 71,745.59

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Solution

The fourth proportional to 128,334.21, 177,101.60 and 71,745.59 is: 99,009.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,334.21 : 177,101.60 = 71,745.59 : x
  2. Step 2: Convert to fraction form
    128,334.21/177,101.60 = 71,745.59/x
  3. Step 3: Cross multiply
    128,334.21x = 177,101.60 × 71,745.59
  4. Step 4: Simplify right side
    128,334.21x = 12,706,258,781.94
  5. Step 5: Solve for x
    x = 12,706,258,781.94/128,334.21
  6. Step 6: Final answer
    x = 99,009.13

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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.