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Finding the Fourth Proportional to 36,699.90, 55,107.45 and 21,147.90

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Solution

The fourth proportional to 36,699.90, 55,107.45 and 21,147.90 is: 31,755.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,699.90 : 55,107.45 = 21,147.90 : x
  2. Step 2: Convert to fraction form
    36,699.90/55,107.45 = 21,147.90/x
  3. Step 3: Cross multiply
    36,699.90x = 55,107.45 × 21,147.90
  4. Step 4: Simplify right side
    36,699.90x = 1,165,406,841.86
  5. Step 5: Solve for x
    x = 1,165,406,841.86/36,699.90
  6. Step 6: Final answer
    x = 31,755.04

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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.