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Finding the Fourth Proportional to 81,576.99, 122,339.57 and 55,449.63

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Solution

The fourth proportional to 81,576.99, 122,339.57 and 55,449.63 is: 83,156.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,576.99 : 122,339.57 = 55,449.63 : x
  2. Step 2: Convert to fraction form
    81,576.99/122,339.57 = 55,449.63/x
  3. Step 3: Cross multiply
    81,576.99x = 122,339.57 × 55,449.63
  4. Step 4: Simplify right side
    81,576.99x = 6,783,683,613.61
  5. Step 5: Solve for x
    x = 6,783,683,613.61/81,576.99
  6. Step 6: Final answer
    x = 83,156.83

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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.