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Finding the Fourth Proportional to 204,855.40, 307,455.90 and 99,764.20

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Solution

The fourth proportional to 204,855.40, 307,455.90 and 99,764.20 is: 149,730.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,855.40 : 307,455.90 = 99,764.20 : x
  2. Step 2: Convert to fraction form
    204,855.40/307,455.90 = 99,764.20/x
  3. Step 3: Cross multiply
    204,855.40x = 307,455.90 × 99,764.20
  4. Step 4: Simplify right side
    204,855.40x = 30,673,091,898.78
  5. Step 5: Solve for x
    x = 30,673,091,898.78/204,855.40
  6. Step 6: Final answer
    x = 149,730.45

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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.