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Finding the Fourth Proportional to 136,883.60, 205,440.60 and 66,822.80

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Solution

The fourth proportional to 136,883.60, 205,440.60 and 66,822.80 is: 100,290.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,883.60 : 205,440.60 = 66,822.80 : x
  2. Step 2: Convert to fraction form
    136,883.60/205,440.60 = 66,822.80/x
  3. Step 3: Cross multiply
    136,883.60x = 205,440.60 × 66,822.80
  4. Step 4: Simplify right side
    136,883.60x = 13,728,116,125.68
  5. Step 5: Solve for x
    x = 13,728,116,125.68/136,883.60
  6. Step 6: Final answer
    x = 100,290.44

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1.5x scale

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.