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Finding the Fourth Proportional to 111,715.66, 154,158.44 and 65,768.00

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Solution

The fourth proportional to 111,715.66, 154,158.44 and 65,768.00 is: 90,754.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,715.66 : 154,158.44 = 65,768.00 : x
  2. Step 2: Convert to fraction form
    111,715.66/154,158.44 = 65,768.00/x
  3. Step 3: Cross multiply
    111,715.66x = 154,158.44 × 65,768.00
  4. Step 4: Simplify right side
    111,715.66x = 10,138,692,831.74
  5. Step 5: Solve for x
    x = 10,138,692,831.74/111,715.66
  6. Step 6: Final answer
    x = 90,754.45

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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.