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Finding the Fourth Proportional to 111,611.12, 153,979.72 and 63,838.94

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Solution

The fourth proportional to 111,611.12, 153,979.72 and 63,838.94 is: 88,072.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,611.12 : 153,979.72 = 63,838.94 : x
  2. Step 2: Convert to fraction form
    111,611.12/153,979.72 = 63,838.94/x
  3. Step 3: Cross multiply
    111,611.12x = 153,979.72 × 63,838.94
  4. Step 4: Simplify right side
    111,611.12x = 9,829,901,176.80
  5. Step 5: Solve for x
    x = 9,829,901,176.80/111,611.12
  6. Step 6: Final answer
    x = 88,072.78

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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.