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Finding the Fourth Proportional to 66,021.98, 99,042.38 and 21,652.20

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Solution

The fourth proportional to 66,021.98, 99,042.38 and 21,652.20 is: 32,481.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,021.98 : 99,042.38 = 21,652.20 : x
  2. Step 2: Convert to fraction form
    66,021.98/99,042.38 = 21,652.20/x
  3. Step 3: Cross multiply
    66,021.98x = 99,042.38 × 21,652.20
  4. Step 4: Simplify right side
    66,021.98x = 2,144,485,311.98
  5. Step 5: Solve for x
    x = 2,144,485,311.98/66,021.98
  6. Step 6: Final answer
    x = 32,481.39

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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.