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Finding the Fourth Proportional to 217,842.30, 326,879.55 and 84,726.90

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Solution

The fourth proportional to 217,842.30, 326,879.55 and 84,726.90 is: 127,135.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,842.30 : 326,879.55 = 84,726.90 : x
  2. Step 2: Convert to fraction form
    217,842.30/326,879.55 = 84,726.90/x
  3. Step 3: Cross multiply
    217,842.30x = 326,879.55 × 84,726.90
  4. Step 4: Simplify right side
    217,842.30x = 27,695,490,944.90
  5. Step 5: Solve for x
    x = 27,695,490,944.90/217,842.30
  6. Step 6: Final answer
    x = 127,135.51

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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.