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Finding the Fourth Proportional to 43,781.98, 65,666.44 and 12,188.74

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Solution

The fourth proportional to 43,781.98, 65,666.44 and 12,188.74 is: 18,281.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,781.98 : 65,666.44 = 12,188.74 : x
  2. Step 2: Convert to fraction form
    43,781.98/65,666.44 = 12,188.74/x
  3. Step 3: Cross multiply
    43,781.98x = 65,666.44 × 12,188.74
  4. Step 4: Simplify right side
    43,781.98x = 800,391,163.89
  5. Step 5: Solve for x
    x = 800,391,163.89/43,781.98
  6. Step 6: Final answer
    x = 18,281.29

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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.