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Finding the Fourth Proportional to 43,679.90, 65,493.40 and 28,493.82

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Solution

The fourth proportional to 43,679.90, 65,493.40 and 28,493.82 is: 42,723.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,679.90 : 65,493.40 = 28,493.82 : x
  2. Step 2: Convert to fraction form
    43,679.90/65,493.40 = 28,493.82/x
  3. Step 3: Cross multiply
    43,679.90x = 65,493.40 × 28,493.82
  4. Step 4: Simplify right side
    43,679.90x = 1,866,157,079.55
  5. Step 5: Solve for x
    x = 1,866,157,079.55/43,679.90
  6. Step 6: Final answer
    x = 42,723.47

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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.