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Finding the Fourth Proportional to 61,003.70, 91,487.94 and 21,021.05

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Solution

The fourth proportional to 61,003.70, 91,487.94 and 21,021.05 is: 31,525.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,003.70 : 91,487.94 = 21,021.05 : x
  2. Step 2: Convert to fraction form
    61,003.70/91,487.94 = 21,021.05/x
  3. Step 3: Cross multiply
    61,003.70x = 91,487.94 × 21,021.05
  4. Step 4: Simplify right side
    61,003.70x = 1,923,172,103.70
  5. Step 5: Solve for x
    x = 1,923,172,103.70/61,003.70
  6. Step 6: Final answer
    x = 31,525.50

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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.