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Finding the Fourth Proportional to 66,554.37, 99,836.34 and 20,958.15

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Solution

The fourth proportional to 66,554.37, 99,836.34 and 20,958.15 is: 31,438.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,554.37 : 99,836.34 = 20,958.15 : x
  2. Step 2: Convert to fraction form
    66,554.37/99,836.34 = 20,958.15/x
  3. Step 3: Cross multiply
    66,554.37x = 99,836.34 × 20,958.15
  4. Step 4: Simplify right side
    66,554.37x = 2,092,384,989.17
  5. Step 5: Solve for x
    x = 2,092,384,989.17/66,554.37
  6. Step 6: Final answer
    x = 31,438.73

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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.