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Finding the Fourth Proportional to 272,491.08, 408,145.86 and 131,955

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Solution

The fourth proportional to 272,491.08, 408,145.86 and 131,955 is: 197,646.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,491.08 : 408,145.86 = 131,955 : x
  2. Step 2: Convert to fraction form
    272,491.08/408,145.86 = 131,955/x
  3. Step 3: Cross multiply
    272,491.08x = 408,145.86 × 131,955
  4. Step 4: Simplify right side
    272,491.08x = 53,856,886,956.30
  5. Step 5: Solve for x
    x = 53,856,886,956.30/272,491.08
  6. Step 6: Final answer
    x = 197,646.42

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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.