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Finding the Fourth Proportional to 118,498.60, 163,383.78 and 111,629.80

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Solution

The fourth proportional to 118,498.60, 163,383.78 and 111,629.80 is: 153,913.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,498.60 : 163,383.78 = 111,629.80 : x
  2. Step 2: Convert to fraction form
    118,498.60/163,383.78 = 111,629.80/x
  3. Step 3: Cross multiply
    118,498.60x = 163,383.78 × 111,629.80
  4. Step 4: Simplify right side
    118,498.60x = 18,238,498,684.64
  5. Step 5: Solve for x
    x = 18,238,498,684.64/118,498.60
  6. Step 6: Final answer
    x = 153,913.20

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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.