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Finding the Fourth Proportional to 118,453.56, 163,512 and 80,194.40

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Solution

The fourth proportional to 118,453.56, 163,512 and 80,194.40 is: 110,699.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,453.56 : 163,512 = 80,194.40 : x
  2. Step 2: Convert to fraction form
    118,453.56/163,512 = 80,194.40/x
  3. Step 3: Cross multiply
    118,453.56x = 163,512 × 80,194.40
  4. Step 4: Simplify right side
    118,453.56x = 13,112,746,732.80
  5. Step 5: Solve for x
    x = 13,112,746,732.80/118,453.56
  6. Step 6: Final answer
    x = 110,699.47

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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.