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Finding the Fourth Proportional to 131,674.59, 181,709.63 and 71,243.91

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Solution

The fourth proportional to 131,674.59, 181,709.63 and 71,243.91 is: 98,315.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,674.59 : 181,709.63 = 71,243.91 : x
  2. Step 2: Convert to fraction form
    131,674.59/181,709.63 = 71,243.91/x
  3. Step 3: Cross multiply
    131,674.59x = 181,709.63 × 71,243.91
  4. Step 4: Simplify right side
    131,674.59x = 12,945,704,525.85
  5. Step 5: Solve for x
    x = 12,945,704,525.85/131,674.59
  6. Step 6: Final answer
    x = 98,315.89

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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.