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Finding the Fourth Proportional to 136,706.80, 204,906.60 and 70,121.20

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Solution

The fourth proportional to 136,706.80, 204,906.60 and 70,121.20 is: 105,103.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,706.80 : 204,906.60 = 70,121.20 : x
  2. Step 2: Convert to fraction form
    136,706.80/204,906.60 = 70,121.20/x
  3. Step 3: Cross multiply
    136,706.80x = 204,906.60 × 70,121.20
  4. Step 4: Simplify right side
    136,706.80x = 14,368,296,679.92
  5. Step 5: Solve for x
    x = 14,368,296,679.92/136,706.80
  6. Step 6: Final answer
    x = 105,103.01

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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.