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Finding the Fourth Proportional to 91,706.70, 137,871.09 and 73,222.86

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Solution

The fourth proportional to 91,706.70, 137,871.09 and 73,222.86 is: 110,082.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,706.70 : 137,871.09 = 73,222.86 : x
  2. Step 2: Convert to fraction form
    91,706.70/137,871.09 = 73,222.86/x
  3. Step 3: Cross multiply
    91,706.70x = 137,871.09 × 73,222.86
  4. Step 4: Simplify right side
    91,706.70x = 10,095,315,521.12
  5. Step 5: Solve for x
    x = 10,095,315,521.12/91,706.70
  6. Step 6: Final answer
    x = 110,082.64

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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.