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Finding the Fourth Proportional to 81,682.60, 122,596.80 and 70,601.80

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Solution

The fourth proportional to 81,682.60, 122,596.80 and 70,601.80 is: 105,965.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,682.60 : 122,596.80 = 70,601.80 : x
  2. Step 2: Convert to fraction form
    81,682.60/122,596.80 = 70,601.80/x
  3. Step 3: Cross multiply
    81,682.60x = 122,596.80 × 70,601.80
  4. Step 4: Simplify right side
    81,682.60x = 8,655,554,754.24
  5. Step 5: Solve for x
    x = 8,655,554,754.24/81,682.60
  6. Step 6: Final answer
    x = 105,965.71

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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.