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Finding the Fourth Proportional to 45,660.60, 68,489.94 and 21,036.60

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Solution

The fourth proportional to 45,660.60, 68,489.94 and 21,036.60 is: 31,554.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,660.60 : 68,489.94 = 21,036.60 : x
  2. Step 2: Convert to fraction form
    45,660.60/68,489.94 = 21,036.60/x
  3. Step 3: Cross multiply
    45,660.60x = 68,489.94 × 21,036.60
  4. Step 4: Simplify right side
    45,660.60x = 1,440,795,471.80
  5. Step 5: Solve for x
    x = 1,440,795,471.80/45,660.60
  6. Step 6: Final answer
    x = 31,554.46

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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.