Home / 76,516.26-114,781-21,112.26

Finding the Fourth Proportional to 76,516.26, 114,781 and 21,112.26

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Solution

The fourth proportional to 76,516.26, 114,781 and 21,112.26 is: 31,670.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,516.26 : 114,781 = 21,112.26 : x
  2. Step 2: Convert to fraction form
    76,516.26/114,781 = 21,112.26/x
  3. Step 3: Cross multiply
    76,516.26x = 114,781 × 21,112.26
  4. Step 4: Simplify right side
    76,516.26x = 2,423,286,315.06
  5. Step 5: Solve for x
    x = 2,423,286,315.06/76,516.26
  6. Step 6: Final answer
    x = 31,670.21

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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.