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Finding the Fourth Proportional to 136,954.40, 205,431.60 and 115,959.20

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Solution

The fourth proportional to 136,954.40, 205,431.60 and 115,959.20 is: 173,938.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,954.40 : 205,431.60 = 115,959.20 : x
  2. Step 2: Convert to fraction form
    136,954.40/205,431.60 = 115,959.20/x
  3. Step 3: Cross multiply
    136,954.40x = 205,431.60 × 115,959.20
  4. Step 4: Simplify right side
    136,954.40x = 23,821,683,990.72
  5. Step 5: Solve for x
    x = 23,821,683,990.72/136,954.40
  6. Step 6: Final answer
    x = 173,938.80

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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.