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Finding the Fourth Proportional to 217,910.66, 326,860.52 and 89,798.63

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Solution

The fourth proportional to 217,910.66, 326,860.52 and 89,798.63 is: 134,695.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,910.66 : 326,860.52 = 89,798.63 : x
  2. Step 2: Convert to fraction form
    217,910.66/326,860.52 = 89,798.63/x
  3. Step 3: Cross multiply
    217,910.66x = 326,860.52 × 89,798.63
  4. Step 4: Simplify right side
    217,910.66x = 29,351,624,813.79
  5. Step 5: Solve for x
    x = 29,351,624,813.79/217,910.66
  6. Step 6: Final answer
    x = 134,695.68

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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.