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Finding the Fourth Proportional to 45,689.88, 68,536.26 and 12,409.86

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Solution

The fourth proportional to 45,689.88, 68,536.26 and 12,409.86 is: 18,615.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,689.88 : 68,536.26 = 12,409.86 : x
  2. Step 2: Convert to fraction form
    45,689.88/68,536.26 = 12,409.86/x
  3. Step 3: Cross multiply
    45,689.88x = 68,536.26 × 12,409.86
  4. Step 4: Simplify right side
    45,689.88x = 850,525,391.52
  5. Step 5: Solve for x
    x = 850,525,391.52/45,689.88
  6. Step 6: Final answer
    x = 18,615.18

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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.