Home / 71,573.78-107,352.46-18,987.36

Finding the Fourth Proportional to 71,573.78, 107,352.46 and 18,987.36

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Solution

The fourth proportional to 71,573.78, 107,352.46 and 18,987.36 is: 28,478.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,573.78 : 107,352.46 = 18,987.36 : x
  2. Step 2: Convert to fraction form
    71,573.78/107,352.46 = 18,987.36/x
  3. Step 3: Cross multiply
    71,573.78x = 107,352.46 × 18,987.36
  4. Step 4: Simplify right side
    71,573.78x = 2,038,339,709.97
  5. Step 5: Solve for x
    x = 2,038,339,709.97/71,573.78
  6. Step 6: Final answer
    x = 28,478.86

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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.