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Finding the Fourth Proportional to 128,896.40, 193,258.20 and 58,739.60

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Solution

The fourth proportional to 128,896.40, 193,258.20 and 58,739.60 is: 88,070.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,896.40 : 193,258.20 = 58,739.60 : x
  2. Step 2: Convert to fraction form
    128,896.40/193,258.20 = 58,739.60/x
  3. Step 3: Cross multiply
    128,896.40x = 193,258.20 × 58,739.60
  4. Step 4: Simplify right side
    128,896.40x = 11,351,909,364.72
  5. Step 5: Solve for x
    x = 11,351,909,364.72/128,896.40
  6. Step 6: Final answer
    x = 88,070.03

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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.