Home / 78,396.86-117,514.80-30,992.69

Finding the Fourth Proportional to 78,396.86, 117,514.80 and 30,992.69

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Solution

The fourth proportional to 78,396.86, 117,514.80 and 30,992.69 is: 46,457.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,396.86 : 117,514.80 = 30,992.69 : x
  2. Step 2: Convert to fraction form
    78,396.86/117,514.80 = 30,992.69/x
  3. Step 3: Cross multiply
    78,396.86x = 117,514.80 × 30,992.69
  4. Step 4: Simplify right side
    78,396.86x = 3,642,099,179.24
  5. Step 5: Solve for x
    x = 3,642,099,179.24/78,396.86
  6. Step 6: Final answer
    x = 46,457.21

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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.