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Finding the Fourth Proportional to 111,409.17, 153,764.31 and 66,112.13

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Solution

The fourth proportional to 111,409.17, 153,764.31 and 66,112.13 is: 91,246.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,409.17 : 153,764.31 = 66,112.13 : x
  2. Step 2: Convert to fraction form
    111,409.17/153,764.31 = 66,112.13/x
  3. Step 3: Cross multiply
    111,409.17x = 153,764.31 × 66,112.13
  4. Step 4: Simplify right side
    111,409.17x = 10,165,686,052.08
  5. Step 5: Solve for x
    x = 10,165,686,052.08/111,409.17
  6. Step 6: Final answer
    x = 91,246.40

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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.