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Finding the Fourth Proportional to 111,776.77, 154,172.62 and 68,699.70

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Solution

The fourth proportional to 111,776.77, 154,172.62 and 68,699.70 is: 94,756.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,776.77 : 154,172.62 = 68,699.70 : x
  2. Step 2: Convert to fraction form
    111,776.77/154,172.62 = 68,699.70/x
  3. Step 3: Cross multiply
    111,776.77x = 154,172.62 × 68,699.70
  4. Step 4: Simplify right side
    111,776.77x = 10,591,613,117.16
  5. Step 5: Solve for x
    x = 10,591,613,117.16/111,776.77
  6. Step 6: Final answer
    x = 94,756.84

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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.