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Finding the Fourth Proportional to 111,490.86, 153,847.08 and 66,161.01

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Solution

The fourth proportional to 111,490.86, 153,847.08 and 66,161.01 is: 91,296.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,490.86 : 153,847.08 = 66,161.01 : x
  2. Step 2: Convert to fraction form
    111,490.86/153,847.08 = 66,161.01/x
  3. Step 3: Cross multiply
    111,490.86x = 153,847.08 × 66,161.01
  4. Step 4: Simplify right side
    111,490.86x = 10,178,678,198.35
  5. Step 5: Solve for x
    x = 10,178,678,198.35/111,490.86
  6. Step 6: Final answer
    x = 91,296.08

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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.