Home / 78,120.96-117,197.52-31,377.48

Finding the Fourth Proportional to 78,120.96, 117,197.52 and 31,377.48

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Solution

The fourth proportional to 78,120.96, 117,197.52 and 31,377.48 is: 47,072.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,120.96 : 117,197.52 = 31,377.48 : x
  2. Step 2: Convert to fraction form
    78,120.96/117,197.52 = 31,377.48/x
  3. Step 3: Cross multiply
    78,120.96x = 117,197.52 × 31,377.48
  4. Step 4: Simplify right side
    78,120.96x = 3,677,362,839.85
  5. Step 5: Solve for x
    x = 3,677,362,839.85/78,120.96
  6. Step 6: Final answer
    x = 47,072.68

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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.