Home / 78,514.86-117,703.14-31,163.19

Finding the Fourth Proportional to 78,514.86, 117,703.14 and 31,163.19

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Solution

The fourth proportional to 78,514.86, 117,703.14 and 31,163.19 is: 46,717.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,514.86 : 117,703.14 = 31,163.19 : x
  2. Step 2: Convert to fraction form
    78,514.86/117,703.14 = 31,163.19/x
  3. Step 3: Cross multiply
    78,514.86x = 117,703.14 × 31,163.19
  4. Step 4: Simplify right side
    78,514.86x = 3,668,005,315.42
  5. Step 5: Solve for x
    x = 3,668,005,315.42/78,514.86
  6. Step 6: Final answer
    x = 46,717.34

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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.