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Finding the Fourth Proportional to 66,699.68, 100,034.64 and 19,946.48

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Solution

The fourth proportional to 66,699.68, 100,034.64 and 19,946.48 is: 29,915.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,699.68 : 100,034.64 = 19,946.48 : x
  2. Step 2: Convert to fraction form
    66,699.68/100,034.64 = 19,946.48/x
  3. Step 3: Cross multiply
    66,699.68x = 100,034.64 × 19,946.48
  4. Step 4: Simplify right side
    66,699.68x = 1,995,338,946.07
  5. Step 5: Solve for x
    x = 1,995,338,946.07/66,699.68
  6. Step 6: Final answer
    x = 29,915.27

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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.