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Finding the Fourth Proportional to 111,390.68, 153,704.97 and 63,647.12

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Solution

The fourth proportional to 111,390.68, 153,704.97 and 63,647.12 is: 87,824.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,390.68 : 153,704.97 = 63,647.12 : x
  2. Step 2: Convert to fraction form
    111,390.68/153,704.97 = 63,647.12/x
  3. Step 3: Cross multiply
    111,390.68x = 153,704.97 × 63,647.12
  4. Step 4: Simplify right side
    111,390.68x = 9,782,877,901.66
  5. Step 5: Solve for x
    x = 9,782,877,901.66/111,390.68
  6. Step 6: Final answer
    x = 87,824.93

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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.