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Finding the Fourth Proportional to 98,986.14, 136,713.64 and 67,099.68

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Solution

The fourth proportional to 98,986.14, 136,713.64 and 67,099.68 is: 92,674.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,986.14 : 136,713.64 = 67,099.68 : x
  2. Step 2: Convert to fraction form
    98,986.14/136,713.64 = 67,099.68/x
  3. Step 3: Cross multiply
    98,986.14x = 136,713.64 × 67,099.68
  4. Step 4: Simplify right side
    98,986.14x = 9,173,442,152.73
  5. Step 5: Solve for x
    x = 9,173,442,152.73/98,986.14
  6. Step 6: Final answer
    x = 92,674.00

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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.