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Finding the Fourth Proportional to 111,507.84, 153,855.45 and 66,162.42

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Solution

The fourth proportional to 111,507.84, 153,855.45 and 66,162.42 is: 91,289.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,507.84 : 153,855.45 = 66,162.42 : x
  2. Step 2: Convert to fraction form
    111,507.84/153,855.45 = 66,162.42/x
  3. Step 3: Cross multiply
    111,507.84x = 153,855.45 × 66,162.42
  4. Step 4: Simplify right side
    111,507.84x = 10,179,448,902.19
  5. Step 5: Solve for x
    x = 10,179,448,902.19/111,507.84
  6. Step 6: Final answer
    x = 91,289.09

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1.5x scale

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.