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Finding the Fourth Proportional to 213,321.30, 319,895.55 and 73,007.70

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Solution

The fourth proportional to 213,321.30, 319,895.55 and 73,007.70 is: 109,481.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,321.30 : 319,895.55 = 73,007.70 : x
  2. Step 2: Convert to fraction form
    213,321.30/319,895.55 = 73,007.70/x
  3. Step 3: Cross multiply
    213,321.30x = 319,895.55 × 73,007.70
  4. Step 4: Simplify right side
    213,321.30x = 23,354,838,345.74
  5. Step 5: Solve for x
    x = 23,354,838,345.74/213,321.30
  6. Step 6: Final answer
    x = 109,481.98

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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.