Home / 51,378.63-77,111.70-20,235.75

Finding the Fourth Proportional to 51,378.63, 77,111.70 and 20,235.75

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Solution

The fourth proportional to 51,378.63, 77,111.70 and 20,235.75 is: 30,370.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,378.63 : 77,111.70 = 20,235.75 : x
  2. Step 2: Convert to fraction form
    51,378.63/77,111.70 = 20,235.75/x
  3. Step 3: Cross multiply
    51,378.63x = 77,111.70 × 20,235.75
  4. Step 4: Simplify right side
    51,378.63x = 1,560,413,083.28
  5. Step 5: Solve for x
    x = 1,560,413,083.28/51,378.63
  6. Step 6: Final answer
    x = 30,370.86

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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.