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Finding the Fourth Proportional to 168,615.37, 252,890.61 and 78,633.38

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Solution

The fourth proportional to 168,615.37, 252,890.61 and 78,633.38 is: 117,934.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,615.37 : 252,890.61 = 78,633.38 : x
  2. Step 2: Convert to fraction form
    168,615.37/252,890.61 = 78,633.38/x
  3. Step 3: Cross multiply
    168,615.37x = 252,890.61 × 78,633.38
  4. Step 4: Simplify right side
    168,615.37x = 19,885,643,771.91
  5. Step 5: Solve for x
    x = 19,885,643,771.91/168,615.37
  6. Step 6: Final answer
    x = 117,934.94

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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.