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Finding the Fourth Proportional to 111,021.57, 153,213.41 and 60,720.57

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Solution

The fourth proportional to 111,021.57, 153,213.41 and 60,720.57 is: 83,796.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,021.57 : 153,213.41 = 60,720.57 : x
  2. Step 2: Convert to fraction form
    111,021.57/153,213.41 = 60,720.57/x
  3. Step 3: Cross multiply
    111,021.57x = 153,213.41 × 60,720.57
  4. Step 4: Simplify right side
    111,021.57x = 9,303,205,586.84
  5. Step 5: Solve for x
    x = 9,303,205,586.84/111,021.57
  6. Step 6: Final answer
    x = 83,796.38

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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.