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Finding the Fourth Proportional to 111,438.45, 153,747.66 and 63,657.97

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Solution

The fourth proportional to 111,438.45, 153,747.66 and 63,657.97 is: 87,826.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,438.45 : 153,747.66 = 63,657.97 : x
  2. Step 2: Convert to fraction form
    111,438.45/153,747.66 = 63,657.97/x
  3. Step 3: Cross multiply
    111,438.45x = 153,747.66 × 63,657.97
  4. Step 4: Simplify right side
    111,438.45x = 9,787,263,543.48
  5. Step 5: Solve for x
    x = 9,787,263,543.48/111,438.45
  6. Step 6: Final answer
    x = 87,826.63

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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.