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Finding the Fourth Proportional to 111,503.16, 153,868.75 and 66,183.12

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Solution

The fourth proportional to 111,503.16, 153,868.75 and 66,183.12 is: 91,329.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,503.16 : 153,868.75 = 66,183.12 : x
  2. Step 2: Convert to fraction form
    111,503.16/153,868.75 = 66,183.12/x
  3. Step 3: Cross multiply
    111,503.16x = 153,868.75 × 66,183.12
  4. Step 4: Simplify right side
    111,503.16x = 10,183,513,780.04
  5. Step 5: Solve for x
    x = 10,183,513,780.04/111,503.16
  6. Step 6: Final answer
    x = 91,329.37

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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.