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Finding the Fourth Proportional to 213,173.08, 319,760.60 and 55,390.36

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Solution

The fourth proportional to 213,173.08, 319,760.60 and 55,390.36 is: 83,085.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,173.08 : 319,760.60 = 55,390.36 : x
  2. Step 2: Convert to fraction form
    213,173.08/319,760.60 = 55,390.36/x
  3. Step 3: Cross multiply
    213,173.08x = 319,760.60 × 55,390.36
  4. Step 4: Simplify right side
    213,173.08x = 17,711,654,747.82
  5. Step 5: Solve for x
    x = 17,711,654,747.82/213,173.08
  6. Step 6: Final answer
    x = 83,085.79

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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.