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Finding the Fourth Proportional to 136,870.60, 205,286.70 and 43,385.80

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Solution

The fourth proportional to 136,870.60, 205,286.70 and 43,385.80 is: 65,072.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,870.60 : 205,286.70 = 43,385.80 : x
  2. Step 2: Convert to fraction form
    136,870.60/205,286.70 = 43,385.80/x
  3. Step 3: Cross multiply
    136,870.60x = 205,286.70 × 43,385.80
  4. Step 4: Simplify right side
    136,870.60x = 8,906,527,708.86
  5. Step 5: Solve for x
    x = 8,906,527,708.86/136,870.60
  6. Step 6: Final answer
    x = 65,072.61

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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.