Home / 78,078.06-117,122.22-31,324.86

Finding the Fourth Proportional to 78,078.06, 117,122.22 and 31,324.86

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Solution

The fourth proportional to 78,078.06, 117,122.22 and 31,324.86 is: 46,989.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,078.06 : 117,122.22 = 31,324.86 : x
  2. Step 2: Convert to fraction form
    78,078.06/117,122.22 = 31,324.86/x
  3. Step 3: Cross multiply
    78,078.06x = 117,122.22 × 31,324.86
  4. Step 4: Simplify right side
    78,078.06x = 3,668,837,144.39
  5. Step 5: Solve for x
    x = 3,668,837,144.39/78,078.06
  6. Step 6: Final answer
    x = 46,989.35

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1.5x scale

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.