Home / 91,704.20-137,556.30-81,681.80

Finding the Fourth Proportional to 91,704.20, 137,556.30 and 81,681.80

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Solution

The fourth proportional to 91,704.20, 137,556.30 and 81,681.80 is: 122,522.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,704.20 : 137,556.30 = 81,681.80 : x
  2. Step 2: Convert to fraction form
    91,704.20/137,556.30 = 81,681.80/x
  3. Step 3: Cross multiply
    91,704.20x = 137,556.30 × 81,681.80
  4. Step 4: Simplify right side
    91,704.20x = 11,235,846,185.34
  5. Step 5: Solve for x
    x = 11,235,846,185.34/91,704.20
  6. Step 6: Final answer
    x = 122,522.70

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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.