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Finding the Fourth Proportional to 111,572.40, 153,918.30 and 66,224.55

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Solution

The fourth proportional to 111,572.40, 153,918.30 and 66,224.55 is: 91,359.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,572.40 : 153,918.30 = 66,224.55 : x
  2. Step 2: Convert to fraction form
    111,572.40/153,918.30 = 66,224.55/x
  3. Step 3: Cross multiply
    111,572.40x = 153,918.30 × 66,224.55
  4. Step 4: Simplify right side
    111,572.40x = 10,193,170,154.27
  5. Step 5: Solve for x
    x = 10,193,170,154.27/111,572.40
  6. Step 6: Final answer
    x = 91,359.24

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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.