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Finding the Fourth Proportional to 43,808.20, 65,669.10 and 21,603.40

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Solution

The fourth proportional to 43,808.20, 65,669.10 and 21,603.40 is: 32,383.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,808.20 : 65,669.10 = 21,603.40 : x
  2. Step 2: Convert to fraction form
    43,808.20/65,669.10 = 21,603.40/x
  3. Step 3: Cross multiply
    43,808.20x = 65,669.10 × 21,603.40
  4. Step 4: Simplify right side
    43,808.20x = 1,418,675,834.94
  5. Step 5: Solve for x
    x = 1,418,675,834.94/43,808.20
  6. Step 6: Final answer
    x = 32,383.80

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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.