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Finding the Fourth Proportional to 128,991.78, 193,258.53 and 110,079.90

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Solution

The fourth proportional to 128,991.78, 193,258.53 and 110,079.90 is: 164,924.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,991.78 : 193,258.53 = 110,079.90 : x
  2. Step 2: Convert to fraction form
    128,991.78/193,258.53 = 110,079.90/x
  3. Step 3: Cross multiply
    128,991.78x = 193,258.53 × 110,079.90
  4. Step 4: Simplify right side
    128,991.78x = 21,273,879,656.55
  5. Step 5: Solve for x
    x = 21,273,879,656.55/128,991.78
  6. Step 6: Final answer
    x = 164,924.30

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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.