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Finding the Fourth Proportional to 66,126.30, 99,201.99 and 21,765.84

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Solution

The fourth proportional to 66,126.30, 99,201.99 and 21,765.84 is: 32,652.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,126.30 : 99,201.99 = 21,765.84 : x
  2. Step 2: Convert to fraction form
    66,126.30/99,201.99 = 21,765.84/x
  3. Step 3: Cross multiply
    66,126.30x = 99,201.99 × 21,765.84
  4. Step 4: Simplify right side
    66,126.30x = 2,159,214,642.02
  5. Step 5: Solve for x
    x = 2,159,214,642.02/66,126.30
  6. Step 6: Final answer
    x = 32,652.89

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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.