Home / 128,583.60-177,440.27-71,993.76

Finding the Fourth Proportional to 128,583.60, 177,440.27 and 71,993.76

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Solution

The fourth proportional to 128,583.60, 177,440.27 and 71,993.76 is: 99,348.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,583.60 : 177,440.27 = 71,993.76 : x
  2. Step 2: Convert to fraction form
    128,583.60/177,440.27 = 71,993.76/x
  3. Step 3: Cross multiply
    128,583.60x = 177,440.27 × 71,993.76
  4. Step 4: Simplify right side
    128,583.60x = 12,774,591,852.75
  5. Step 5: Solve for x
    x = 12,774,591,852.75/128,583.60
  6. Step 6: Final answer
    x = 99,348.53

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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.