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Finding the Fourth Proportional to 111,541.78, 153,859.66 and 66,189.48

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Solution

The fourth proportional to 111,541.78, 153,859.66 and 66,189.48 is: 91,301.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,541.78 : 153,859.66 = 66,189.48 : x
  2. Step 2: Convert to fraction form
    111,541.78/153,859.66 = 66,189.48/x
  3. Step 3: Cross multiply
    111,541.78x = 153,859.66 × 66,189.48
  4. Step 4: Simplify right side
    111,541.78x = 10,183,890,888.38
  5. Step 5: Solve for x
    x = 10,183,890,888.38/111,541.78
  6. Step 6: Final answer
    x = 91,301.13

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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.