Home / 128,845.54-177,806.50-72,258.13

Finding the Fourth Proportional to 128,845.54, 177,806.50 and 72,258.13

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Solution

The fourth proportional to 128,845.54, 177,806.50 and 72,258.13 is: 99,716.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,845.54 : 177,806.50 = 72,258.13 : x
  2. Step 2: Convert to fraction form
    128,845.54/177,806.50 = 72,258.13/x
  3. Step 3: Cross multiply
    128,845.54x = 177,806.50 × 72,258.13
  4. Step 4: Simplify right side
    128,845.54x = 12,847,965,191.85
  5. Step 5: Solve for x
    x = 12,847,965,191.85/128,845.54
  6. Step 6: Final answer
    x = 99,716.03

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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.