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Finding the Fourth Proportional to 45,486.86, 68,240.00 and 15,905.66

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Solution

The fourth proportional to 45,486.86, 68,240.00 and 15,905.66 is: 23,861.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,486.86 : 68,240.00 = 15,905.66 : x
  2. Step 2: Convert to fraction form
    45,486.86/68,240.00 = 15,905.66/x
  3. Step 3: Cross multiply
    45,486.86x = 68,240.00 × 15,905.66
  4. Step 4: Simplify right side
    45,486.86x = 1,085,401,936.96
  5. Step 5: Solve for x
    x = 1,085,401,936.96/45,486.86
  6. Step 6: Final answer
    x = 23,861.88

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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.