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Finding the Fourth Proportional to 91,002.80, 136,504.20 and 67,383.20

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Solution

The fourth proportional to 91,002.80, 136,504.20 and 67,383.20 is: 101,074.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,002.80 : 136,504.20 = 67,383.20 : x
  2. Step 2: Convert to fraction form
    91,002.80/136,504.20 = 67,383.20/x
  3. Step 3: Cross multiply
    91,002.80x = 136,504.20 × 67,383.20
  4. Step 4: Simplify right side
    91,002.80x = 9,198,089,809.44
  5. Step 5: Solve for x
    x = 9,198,089,809.44/91,002.80
  6. Step 6: Final answer
    x = 101,074.80

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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.