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Finding the Fourth Proportional to 201,056.40, 301,438.80 and 82,666.80

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Solution

The fourth proportional to 201,056.40, 301,438.80 and 82,666.80 is: 123,940.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,056.40 : 301,438.80 = 82,666.80 : x
  2. Step 2: Convert to fraction form
    201,056.40/301,438.80 = 82,666.80/x
  3. Step 3: Cross multiply
    201,056.40x = 301,438.80 × 82,666.80
  4. Step 4: Simplify right side
    201,056.40x = 24,918,980,991.84
  5. Step 5: Solve for x
    x = 24,918,980,991.84/201,056.40
  6. Step 6: Final answer
    x = 123,940.25

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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.