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Finding the Fourth Proportional to 61,706.80, 86,622.80 and 61,706.80

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Solution

The fourth proportional to 61,706.80, 86,622.80 and 61,706.80 is: 86,622.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,706.80 : 86,622.80 = 61,706.80 : x
  2. Step 2: Convert to fraction form
    61,706.80/86,622.80 = 61,706.80/x
  3. Step 3: Cross multiply
    61,706.80x = 86,622.80 × 61,706.80
  4. Step 4: Simplify right side
    61,706.80x = 5,345,215,795.04
  5. Step 5: Solve for x
    x = 5,345,215,795.04/61,706.80
  6. Step 6: Final answer
    x = 86,622.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.