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Finding the Fourth Proportional to 136,349.28, 187,986.11 and 111,728.57

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Solution

The fourth proportional to 136,349.28, 187,986.11 and 111,728.57 is: 154,041.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,349.28 : 187,986.11 = 111,728.57 : x
  2. Step 2: Convert to fraction form
    136,349.28/187,986.11 = 111,728.57/x
  3. Step 3: Cross multiply
    136,349.28x = 187,986.11 × 111,728.57
  4. Step 4: Simplify right side
    136,349.28x = 21,003,417,751.59
  5. Step 5: Solve for x
    x = 21,003,417,751.59/136,349.28
  6. Step 6: Final answer
    x = 154,041.28

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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.