Home / 78,563.32-117,775.62-31,211.73

Finding the Fourth Proportional to 78,563.32, 117,775.62 and 31,211.73

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Solution

The fourth proportional to 78,563.32, 117,775.62 and 31,211.73 is: 46,790.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,563.32 : 117,775.62 = 31,211.73 : x
  2. Step 2: Convert to fraction form
    78,563.32/117,775.62 = 31,211.73/x
  3. Step 3: Cross multiply
    78,563.32x = 117,775.62 × 31,211.73
  4. Step 4: Simplify right side
    78,563.32x = 3,675,980,852.02
  5. Step 5: Solve for x
    x = 3,675,980,852.02/78,563.32
  6. Step 6: Final answer
    x = 46,790.04

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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.