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Finding the Fourth Proportional to 81,350.40, 122,025.60 and 77,894.40

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Solution

The fourth proportional to 81,350.40, 122,025.60 and 77,894.40 is: 116,841.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,350.40 : 122,025.60 = 77,894.40 : x
  2. Step 2: Convert to fraction form
    81,350.40/122,025.60 = 77,894.40/x
  3. Step 3: Cross multiply
    81,350.40x = 122,025.60 × 77,894.40
  4. Step 4: Simplify right side
    81,350.40x = 9,505,110,896.64
  5. Step 5: Solve for x
    x = 9,505,110,896.64/81,350.40
  6. Step 6: Final answer
    x = 116,841.60

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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.