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Finding the Fourth Proportional to 111,538.89, 153,900.41 and 66,210.48

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Solution

The fourth proportional to 111,538.89, 153,900.41 and 66,210.48 is: 91,356.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,538.89 : 153,900.41 = 66,210.48 : x
  2. Step 2: Convert to fraction form
    111,538.89/153,900.41 = 66,210.48/x
  3. Step 3: Cross multiply
    111,538.89x = 153,900.41 × 66,210.48
  4. Step 4: Simplify right side
    111,538.89x = 10,189,819,687.24
  5. Step 5: Solve for x
    x = 10,189,819,687.24/111,538.89
  6. Step 6: Final answer
    x = 91,356.65

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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.