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Finding the Fourth Proportional to 136,680.80, 205,021.20 and 124,433.60

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Solution

The fourth proportional to 136,680.80, 205,021.20 and 124,433.60 is: 186,650.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,680.80 : 205,021.20 = 124,433.60 : x
  2. Step 2: Convert to fraction form
    136,680.80/205,021.20 = 124,433.60/x
  3. Step 3: Cross multiply
    136,680.80x = 205,021.20 × 124,433.60
  4. Step 4: Simplify right side
    136,680.80x = 25,511,525,992.32
  5. Step 5: Solve for x
    x = 25,511,525,992.32/136,680.80
  6. Step 6: Final answer
    x = 186,650.40

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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.