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Finding the Fourth Proportional to 113,668.67, 170,650.62 and 87,391.86

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Solution

The fourth proportional to 113,668.67, 170,650.62 and 87,391.86 is: 131,201.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,668.67 : 170,650.62 = 87,391.86 : x
  2. Step 2: Convert to fraction form
    113,668.67/170,650.62 = 87,391.86/x
  3. Step 3: Cross multiply
    113,668.67x = 170,650.62 × 87,391.86
  4. Step 4: Simplify right side
    113,668.67x = 14,913,475,091.95
  5. Step 5: Solve for x
    x = 14,913,475,091.95/113,668.67
  6. Step 6: Final answer
    x = 131,201.29

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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.