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Finding the Fourth Proportional to 201,213.40, 301,628.10 and 74,819.80

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Solution

The fourth proportional to 201,213.40, 301,628.10 and 74,819.80 is: 112,158.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,213.40 : 301,628.10 = 74,819.80 : x
  2. Step 2: Convert to fraction form
    201,213.40/301,628.10 = 74,819.80/x
  3. Step 3: Cross multiply
    201,213.40x = 301,628.10 × 74,819.80
  4. Step 4: Simplify right side
    201,213.40x = 22,567,754,116.38
  5. Step 5: Solve for x
    x = 22,567,754,116.38/201,213.40
  6. Step 6: Final answer
    x = 112,158.31

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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.