Home / 78,515.86-117,704.64-31,164.19

Finding the Fourth Proportional to 78,515.86, 117,704.64 and 31,164.19

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Solution

The fourth proportional to 78,515.86, 117,704.64 and 31,164.19 is: 46,718.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,515.86 : 117,704.64 = 31,164.19 : x
  2. Step 2: Convert to fraction form
    78,515.86/117,704.64 = 31,164.19/x
  3. Step 3: Cross multiply
    78,515.86x = 117,704.64 × 31,164.19
  4. Step 4: Simplify right side
    78,515.86x = 3,668,169,764.84
  5. Step 5: Solve for x
    x = 3,668,169,764.84/78,515.86
  6. Step 6: Final answer
    x = 46,718.84

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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.