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Finding the Fourth Proportional to 203,206.60, 304,982.70 and 91,059.40

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Solution

The fourth proportional to 203,206.60, 304,982.70 and 91,059.40 is: 136,666.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,206.60 : 304,982.70 = 91,059.40 : x
  2. Step 2: Convert to fraction form
    203,206.60/304,982.70 = 91,059.40/x
  3. Step 3: Cross multiply
    203,206.60x = 304,982.70 × 91,059.40
  4. Step 4: Simplify right side
    203,206.60x = 27,771,541,672.38
  5. Step 5: Solve for x
    x = 27,771,541,672.38/203,206.60
  6. Step 6: Final answer
    x = 136,666.53

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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.