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Finding the Fourth Proportional to 66,988.42, 100,556.43 and 38,940.10

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Solution

The fourth proportional to 66,988.42, 100,556.43 and 38,940.10 is: 58,453.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,988.42 : 100,556.43 = 38,940.10 : x
  2. Step 2: Convert to fraction form
    66,988.42/100,556.43 = 38,940.10/x
  3. Step 3: Cross multiply
    66,988.42x = 100,556.43 × 38,940.10
  4. Step 4: Simplify right side
    66,988.42x = 3,915,677,439.84
  5. Step 5: Solve for x
    x = 3,915,677,439.84/66,988.42
  6. Step 6: Final answer
    x = 58,453.05

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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.