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Finding the Fourth Proportional to 118,965.75, 178,448.63 and 45,093.75

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Solution

The fourth proportional to 118,965.75, 178,448.63 and 45,093.75 is: 67,640.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,965.75 : 178,448.63 = 45,093.75 : x
  2. Step 2: Convert to fraction form
    118,965.75/178,448.63 = 45,093.75/x
  3. Step 3: Cross multiply
    118,965.75x = 178,448.63 × 45,093.75
  4. Step 4: Simplify right side
    118,965.75x = 8,046,917,683.59
  5. Step 5: Solve for x
    x = 8,046,917,683.59/118,965.75
  6. Step 6: Final answer
    x = 67,640.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.