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Finding the Fourth Proportional to 136,968.60, 205,647.30 and 84,480.60

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Solution

The fourth proportional to 136,968.60, 205,647.30 and 84,480.60 is: 126,840.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,968.60 : 205,647.30 = 84,480.60 : x
  2. Step 2: Convert to fraction form
    136,968.60/205,647.30 = 84,480.60/x
  3. Step 3: Cross multiply
    136,968.60x = 205,647.30 × 84,480.60
  4. Step 4: Simplify right side
    136,968.60x = 17,373,207,292.38
  5. Step 5: Solve for x
    x = 17,373,207,292.38/136,968.60
  6. Step 6: Final answer
    x = 126,840.80

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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.