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Finding the Fourth Proportional to 111,571.32, 153,969.42 and 61,270.68

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Solution

The fourth proportional to 111,571.32, 153,969.42 and 61,270.68 is: 84,554.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,571.32 : 153,969.42 = 61,270.68 : x
  2. Step 2: Convert to fraction form
    111,571.32/153,969.42 = 61,270.68/x
  3. Step 3: Cross multiply
    111,571.32x = 153,969.42 × 61,270.68
  4. Step 4: Simplify right side
    111,571.32x = 9,433,811,062.61
  5. Step 5: Solve for x
    x = 9,433,811,062.61/111,571.32
  6. Step 6: Final answer
    x = 84,554.09

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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.