Home / 78,564.32-117,777.12-31,212.73

Finding the Fourth Proportional to 78,564.32, 117,777.12 and 31,212.73

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Solution

The fourth proportional to 78,564.32, 117,777.12 and 31,212.73 is: 46,791.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,564.32 : 117,777.12 = 31,212.73 : x
  2. Step 2: Convert to fraction form
    78,564.32/117,777.12 = 31,212.73/x
  3. Step 3: Cross multiply
    78,564.32x = 117,777.12 × 31,212.73
  4. Step 4: Simplify right side
    78,564.32x = 3,676,145,446.74
  5. Step 5: Solve for x
    x = 3,676,145,446.74/78,564.32
  6. Step 6: Final answer
    x = 46,791.54

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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.