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Finding the Fourth Proportional to 66,486.90, 99,647.19 and 33,216.30

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Solution

The fourth proportional to 66,486.90, 99,647.19 and 33,216.30 is: 49,782.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,486.90 : 99,647.19 = 33,216.30 : x
  2. Step 2: Convert to fraction form
    66,486.90/99,647.19 = 33,216.30/x
  3. Step 3: Cross multiply
    66,486.90x = 99,647.19 × 33,216.30
  4. Step 4: Simplify right side
    66,486.90x = 3,309,910,957.20
  5. Step 5: Solve for x
    x = 3,309,910,957.20/66,486.90
  6. Step 6: Final answer
    x = 49,782.90

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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.