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Finding the Fourth Proportional to 201,115.40, 301,481.10 and 74,721.80

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Solution

The fourth proportional to 201,115.40, 301,481.10 and 74,721.80 is: 112,011.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,115.40 : 301,481.10 = 74,721.80 : x
  2. Step 2: Convert to fraction form
    201,115.40/301,481.10 = 74,721.80/x
  3. Step 3: Cross multiply
    201,115.40x = 301,481.10 × 74,721.80
  4. Step 4: Simplify right side
    201,115.40x = 22,527,210,457.98
  5. Step 5: Solve for x
    x = 22,527,210,457.98/201,115.40
  6. Step 6: Final answer
    x = 112,011.36

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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.