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Finding the Fourth Proportional to 135,901.80, 203,852.70 and 79,768.80

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Solution

The fourth proportional to 135,901.80, 203,852.70 and 79,768.80 is: 119,653.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,901.80 : 203,852.70 = 79,768.80 : x
  2. Step 2: Convert to fraction form
    135,901.80/203,852.70 = 79,768.80/x
  3. Step 3: Cross multiply
    135,901.80x = 203,852.70 × 79,768.80
  4. Step 4: Simplify right side
    135,901.80x = 16,261,085,255.76
  5. Step 5: Solve for x
    x = 16,261,085,255.76/135,901.80
  6. Step 6: Final answer
    x = 119,653.20

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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.