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Finding the Fourth Proportional to 43,699.80, 65,553.00 and 12,109.50

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Solution

The fourth proportional to 43,699.80, 65,553.00 and 12,109.50 is: 18,165.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,699.80 : 65,553.00 = 12,109.50 : x
  2. Step 2: Convert to fraction form
    43,699.80/65,553.00 = 12,109.50/x
  3. Step 3: Cross multiply
    43,699.80x = 65,553.00 × 12,109.50
  4. Step 4: Simplify right side
    43,699.80x = 793,813,896.46
  5. Step 5: Solve for x
    x = 793,813,896.46/43,699.80
  6. Step 6: Final answer
    x = 18,165.16

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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.