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Finding the Fourth Proportional to 300,432.42, 450,636.84 and 75,789.90

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Solution

The fourth proportional to 300,432.42, 450,636.84 and 75,789.90 is: 113,681.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,432.42 : 450,636.84 = 75,789.90 : x
  2. Step 2: Convert to fraction form
    300,432.42/450,636.84 = 75,789.90/x
  3. Step 3: Cross multiply
    300,432.42x = 450,636.84 × 75,789.90
  4. Step 4: Simplify right side
    300,432.42x = 34,153,721,039.92
  5. Step 5: Solve for x
    x = 34,153,721,039.92/300,432.42
  6. Step 6: Final answer
    x = 113,681.88

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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.