Home / 78,281.44-117,420.64-19,115.52

Finding the Fourth Proportional to 78,281.44, 117,420.64 and 19,115.52

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Solution

The fourth proportional to 78,281.44, 117,420.64 and 19,115.52 is: 28,672.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,281.44 : 117,420.64 = 19,115.52 : x
  2. Step 2: Convert to fraction form
    78,281.44/117,420.64 = 19,115.52/x
  3. Step 3: Cross multiply
    78,281.44x = 117,420.64 × 19,115.52
  4. Step 4: Simplify right side
    78,281.44x = 2,244,556,592.33
  5. Step 5: Solve for x
    x = 2,244,556,592.33/78,281.44
  6. Step 6: Final answer
    x = 28,672.91

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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.