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Finding the Fourth Proportional to 91,704.30, 137,556.45 and 80,040.30

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Solution

The fourth proportional to 91,704.30, 137,556.45 and 80,040.30 is: 120,060.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,704.30 : 137,556.45 = 80,040.30 : x
  2. Step 2: Convert to fraction form
    91,704.30/137,556.45 = 80,040.30/x
  3. Step 3: Cross multiply
    91,704.30x = 137,556.45 × 80,040.30
  4. Step 4: Simplify right side
    91,704.30x = 11,010,059,524.94
  5. Step 5: Solve for x
    x = 11,010,059,524.94/91,704.30
  6. Step 6: Final answer
    x = 120,060.45

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1.5x scale

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.