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Finding the Fourth Proportional to 81,662.85, 122,297.45 and 55,287.63

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Solution

The fourth proportional to 81,662.85, 122,297.45 and 55,287.63 is: 82,798.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,662.85 : 122,297.45 = 55,287.63 : x
  2. Step 2: Convert to fraction form
    81,662.85/122,297.45 = 55,287.63/x
  3. Step 3: Cross multiply
    81,662.85x = 122,297.45 × 55,287.63
  4. Step 4: Simplify right side
    81,662.85x = 6,761,535,889.11
  5. Step 5: Solve for x
    x = 6,761,535,889.11/81,662.85
  6. Step 6: Final answer
    x = 82,798.19

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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.