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Finding the Fourth Proportional to 131,908.91, 197,817.80 and 87,767.96

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Solution

The fourth proportional to 131,908.91, 197,817.80 and 87,767.96 is: 131,621.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,908.91 : 197,817.80 = 87,767.96 : x
  2. Step 2: Convert to fraction form
    131,908.91/197,817.80 = 87,767.96/x
  3. Step 3: Cross multiply
    131,908.91x = 197,817.80 × 87,767.96
  4. Step 4: Simplify right side
    131,908.91x = 17,362,063,329.76
  5. Step 5: Solve for x
    x = 17,362,063,329.76/131,908.91
  6. Step 6: Final answer
    x = 131,621.62

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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.