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Finding the Fourth Proportional to 204,711.40, 307,239.90 and 99,620.20

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Solution

The fourth proportional to 204,711.40, 307,239.90 and 99,620.20 is: 149,514.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,711.40 : 307,239.90 = 99,620.20 : x
  2. Step 2: Convert to fraction form
    204,711.40/307,239.90 = 99,620.20/x
  3. Step 3: Cross multiply
    204,711.40x = 307,239.90 × 99,620.20
  4. Step 4: Simplify right side
    204,711.40x = 30,607,300,285.98
  5. Step 5: Solve for x
    x = 30,607,300,285.98/204,711.40
  6. Step 6: Final answer
    x = 149,514.39

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1.5x scale

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.