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Finding the Fourth Proportional to 213,059.67, 319,711.61 and 86,676.58

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Solution

The fourth proportional to 213,059.67, 319,711.61 and 86,676.58 is: 130,064.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,059.67 : 319,711.61 = 86,676.58 : x
  2. Step 2: Convert to fraction form
    213,059.67/319,711.61 = 86,676.58/x
  3. Step 3: Cross multiply
    213,059.67x = 319,711.61 × 86,676.58
  4. Step 4: Simplify right side
    213,059.67x = 27,711,508,941.09
  5. Step 5: Solve for x
    x = 27,711,508,941.09/213,059.67
  6. Step 6: Final answer
    x = 130,064.54

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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.