Home / 78,507.75-117,800.58-31,121.84

Finding the Fourth Proportional to 78,507.75, 117,800.58 and 31,121.84

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Solution

The fourth proportional to 78,507.75, 117,800.58 and 31,121.84 is: 46,698.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,507.75 : 117,800.58 = 31,121.84 : x
  2. Step 2: Convert to fraction form
    78,507.75/117,800.58 = 31,121.84/x
  3. Step 3: Cross multiply
    78,507.75x = 117,800.58 × 31,121.84
  4. Step 4: Simplify right side
    78,507.75x = 3,666,171,213.88
  5. Step 5: Solve for x
    x = 3,666,171,213.88/78,507.75
  6. Step 6: Final answer
    x = 46,698.21

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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.