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Finding the Fourth Proportional to 111,391.62, 153,728.58 and 63,643.94

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Solution

The fourth proportional to 111,391.62, 153,728.58 and 63,643.94 is: 87,833.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,391.62 : 153,728.58 = 63,643.94 : x
  2. Step 2: Convert to fraction form
    111,391.62/153,728.58 = 63,643.94/x
  3. Step 3: Cross multiply
    111,391.62x = 153,728.58 × 63,643.94
  4. Step 4: Simplify right side
    111,391.62x = 9,783,891,753.16
  5. Step 5: Solve for x
    x = 9,783,891,753.16/111,391.62
  6. Step 6: Final answer
    x = 87,833.28

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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.