Home / 128,800.20-193,110.30-76,182.60

Finding the Fourth Proportional to 128,800.20, 193,110.30 and 76,182.60

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Solution

The fourth proportional to 128,800.20, 193,110.30 and 76,182.60 is: 114,220.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,800.20 : 193,110.30 = 76,182.60 : x
  2. Step 2: Convert to fraction form
    128,800.20/193,110.30 = 76,182.60/x
  3. Step 3: Cross multiply
    128,800.20x = 193,110.30 × 76,182.60
  4. Step 4: Simplify right side
    128,800.20x = 14,711,644,740.78
  5. Step 5: Solve for x
    x = 14,711,644,740.78/128,800.20
  6. Step 6: Final answer
    x = 114,220.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.