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Finding the Fourth Proportional to 66,936, 100,405.92 and 17,688

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Solution

The fourth proportional to 66,936, 100,405.92 and 17,688 is: 26,532.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,936 : 100,405.92 = 17,688 : x
  2. Step 2: Convert to fraction form
    66,936/100,405.92 = 17,688/x
  3. Step 3: Cross multiply
    66,936x = 100,405.92 × 17,688
  4. Step 4: Simplify right side
    66,936x = 1,775,979,912.96
  5. Step 5: Solve for x
    x = 1,775,979,912.96/66,936
  6. Step 6: Final answer
    x = 26,532.51

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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.