Home / 76,851.16-115,263.70-20,678.75

Finding the Fourth Proportional to 76,851.16, 115,263.70 and 20,678.75

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Solution

The fourth proportional to 76,851.16, 115,263.70 and 20,678.75 is: 31,014.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,851.16 : 115,263.70 = 20,678.75 : x
  2. Step 2: Convert to fraction form
    76,851.16/115,263.70 = 20,678.75/x
  3. Step 3: Cross multiply
    76,851.16x = 115,263.70 × 20,678.75
  4. Step 4: Simplify right side
    76,851.16x = 2,383,508,884.47
  5. Step 5: Solve for x
    x = 2,383,508,884.47/76,851.16
  6. Step 6: Final answer
    x = 31,014.61

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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.