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Finding the Fourth Proportional to 43,369.76, 65,069.16 and 18,408.80

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Solution

The fourth proportional to 43,369.76, 65,069.16 and 18,408.80 is: 27,619.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,369.76 : 65,069.16 = 18,408.80 : x
  2. Step 2: Convert to fraction form
    43,369.76/65,069.16 = 18,408.80/x
  3. Step 3: Cross multiply
    43,369.76x = 65,069.16 × 18,408.80
  4. Step 4: Simplify right side
    43,369.76x = 1,197,845,152.61
  5. Step 5: Solve for x
    x = 1,197,845,152.61/43,369.76
  6. Step 6: Final answer
    x = 27,619.36

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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.