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Finding the Fourth Proportional to 131,805.20, 181,890.86 and 71,375.86

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Solution

The fourth proportional to 131,805.20, 181,890.86 and 71,375.86 is: 98,498.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,805.20 : 181,890.86 = 71,375.86 : x
  2. Step 2: Convert to fraction form
    131,805.20/181,890.86 = 71,375.86/x
  3. Step 3: Cross multiply
    131,805.20x = 181,890.86 × 71,375.86
  4. Step 4: Simplify right side
    131,805.20x = 12,982,616,558.64
  5. Step 5: Solve for x
    x = 12,982,616,558.64/131,805.20
  6. Step 6: Final answer
    x = 98,498.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.