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Finding the Fourth Proportional to 93,326.80, 139,990.20 and 81,662.80

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Solution

The fourth proportional to 93,326.80, 139,990.20 and 81,662.80 is: 122,494.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,326.80 : 139,990.20 = 81,662.80 : x
  2. Step 2: Convert to fraction form
    93,326.80/139,990.20 = 81,662.80/x
  3. Step 3: Cross multiply
    93,326.80x = 139,990.20 × 81,662.80
  4. Step 4: Simplify right side
    93,326.80x = 11,431,991,704.56
  5. Step 5: Solve for x
    x = 11,431,991,704.56/93,326.80
  6. Step 6: Final answer
    x = 122,494.20

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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.