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Finding the Fourth Proportional to 118,600.56, 163,728 and 68,289.84

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Solution

The fourth proportional to 118,600.56, 163,728 and 68,289.84 is: 94,274.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,600.56 : 163,728 = 68,289.84 : x
  2. Step 2: Convert to fraction form
    118,600.56/163,728 = 68,289.84/x
  3. Step 3: Cross multiply
    118,600.56x = 163,728 × 68,289.84
  4. Step 4: Simplify right side
    118,600.56x = 11,180,958,923.52
  5. Step 5: Solve for x
    x = 11,180,958,923.52/118,600.56
  6. Step 6: Final answer
    x = 94,274.08

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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.