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Finding the Fourth Proportional to 82,960.40, 124,440.60 and 56,716.40

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Solution

The fourth proportional to 82,960.40, 124,440.60 and 56,716.40 is: 85,074.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,960.40 : 124,440.60 = 56,716.40 : x
  2. Step 2: Convert to fraction form
    82,960.40/124,440.60 = 56,716.40/x
  3. Step 3: Cross multiply
    82,960.40x = 124,440.60 × 56,716.40
  4. Step 4: Simplify right side
    82,960.40x = 7,057,822,845.84
  5. Step 5: Solve for x
    x = 7,057,822,845.84/82,960.40
  6. Step 6: Final answer
    x = 85,074.60

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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.