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Finding the Fourth Proportional to 43,950.88, 65,931.12 and 12,791.20

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Solution

The fourth proportional to 43,950.88, 65,931.12 and 12,791.20 is: 19,188.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,950.88 : 65,931.12 = 12,791.20 : x
  2. Step 2: Convert to fraction form
    43,950.88/65,931.12 = 12,791.20/x
  3. Step 3: Cross multiply
    43,950.88x = 65,931.12 × 12,791.20
  4. Step 4: Simplify right side
    43,950.88x = 843,338,142.14
  5. Step 5: Solve for x
    x = 843,338,142.14/43,950.88
  6. Step 6: Final answer
    x = 19,188.20

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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.