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Finding the Fourth Proportional to 82,940.40, 124,410.60 and 56,696.40

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Solution

The fourth proportional to 82,940.40, 124,410.60 and 56,696.40 is: 85,044.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,940.40 : 124,410.60 = 56,696.40 : x
  2. Step 2: Convert to fraction form
    82,940.40/124,410.60 = 56,696.40/x
  3. Step 3: Cross multiply
    82,940.40x = 124,410.60 × 56,696.40
  4. Step 4: Simplify right side
    82,940.40x = 7,053,633,141.84
  5. Step 5: Solve for x
    x = 7,053,633,141.84/82,940.40
  6. Step 6: Final answer
    x = 85,044.60

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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.