Home / 76,766.91-115,072.35-31,812.72

Finding the Fourth Proportional to 76,766.91, 115,072.35 and 31,812.72

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Solution

The fourth proportional to 76,766.91, 115,072.35 and 31,812.72 is: 47,686.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,766.91 : 115,072.35 = 31,812.72 : x
  2. Step 2: Convert to fraction form
    76,766.91/115,072.35 = 31,812.72/x
  3. Step 3: Cross multiply
    76,766.91x = 115,072.35 × 31,812.72
  4. Step 4: Simplify right side
    76,766.91x = 3,660,764,606.96
  5. Step 5: Solve for x
    x = 3,660,764,606.96/76,766.91
  6. Step 6: Final answer
    x = 47,686.75

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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.