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Finding the Fourth Proportional to 131,898.49, 197,890.11 and 43,131.80

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Solution

The fourth proportional to 131,898.49, 197,890.11 and 43,131.80 is: 64,711.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,898.49 : 197,890.11 = 43,131.80 : x
  2. Step 2: Convert to fraction form
    131,898.49/197,890.11 = 43,131.80/x
  3. Step 3: Cross multiply
    131,898.49x = 197,890.11 × 43,131.80
  4. Step 4: Simplify right side
    131,898.49x = 8,535,357,141.22
  5. Step 5: Solve for x
    x = 8,535,357,141.22/131,898.49
  6. Step 6: Final answer
    x = 64,711.56

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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.