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Finding the Fourth Proportional to 111,516.75, 153,891.29 and 63,768.47

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Solution

The fourth proportional to 111,516.75, 153,891.29 and 63,768.47 is: 87,999.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,516.75 : 153,891.29 = 63,768.47 : x
  2. Step 2: Convert to fraction form
    111,516.75/153,891.29 = 63,768.47/x
  3. Step 3: Cross multiply
    111,516.75x = 153,891.29 × 63,768.47
  4. Step 4: Simplify right side
    111,516.75x = 9,813,411,499.59
  5. Step 5: Solve for x
    x = 9,813,411,499.59/111,516.75
  6. Step 6: Final answer
    x = 87,999.44

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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.