Home / 135,292.80-203,121.60-79,190.40

Finding the Fourth Proportional to 135,292.80, 203,121.60 and 79,190.40

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Solution

The fourth proportional to 135,292.80, 203,121.60 and 79,190.40 is: 118,892.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,292.80 : 203,121.60 = 79,190.40 : x
  2. Step 2: Convert to fraction form
    135,292.80/203,121.60 = 79,190.40/x
  3. Step 3: Cross multiply
    135,292.80x = 203,121.60 × 79,190.40
  4. Step 4: Simplify right side
    135,292.80x = 16,085,280,752.64
  5. Step 5: Solve for x
    x = 16,085,280,752.64/135,292.80
  6. Step 6: Final answer
    x = 118,892.36

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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.