Home / 76,721.10-115,072.29-20,565.42

Finding the Fourth Proportional to 76,721.10, 115,072.29 and 20,565.42

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Solution

The fourth proportional to 76,721.10, 115,072.29 and 20,565.42 is: 30,845.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,721.10 : 115,072.29 = 20,565.42 : x
  2. Step 2: Convert to fraction form
    76,721.10/115,072.29 = 20,565.42/x
  3. Step 3: Cross multiply
    76,721.10x = 115,072.29 × 20,565.42
  4. Step 4: Simplify right side
    76,721.10x = 2,366,509,974.21
  5. Step 5: Solve for x
    x = 2,366,509,974.21/76,721.10
  6. Step 6: Final answer
    x = 30,845.62

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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.