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Finding the Fourth Proportional to 93,286.18, 128,815.41 and 79,989.22

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Solution

The fourth proportional to 93,286.18, 128,815.41 and 79,989.22 is: 110,454.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,286.18 : 128,815.41 = 79,989.22 : x
  2. Step 2: Convert to fraction form
    93,286.18/128,815.41 = 79,989.22/x
  3. Step 3: Cross multiply
    93,286.18x = 128,815.41 × 79,989.22
  4. Step 4: Simplify right side
    93,286.18x = 10,303,844,169.88
  5. Step 5: Solve for x
    x = 10,303,844,169.88/93,286.18
  6. Step 6: Final answer
    x = 110,454.13

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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.