Home / 51,128.80-76,705.92-40,638.40

Finding the Fourth Proportional to 51,128.80, 76,705.92 and 40,638.40

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Solution

The fourth proportional to 51,128.80, 76,705.92 and 40,638.40 is: 60,967.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,128.80 : 76,705.92 = 40,638.40 : x
  2. Step 2: Convert to fraction form
    51,128.80/76,705.92 = 40,638.40/x
  3. Step 3: Cross multiply
    51,128.80x = 76,705.92 × 40,638.40
  4. Step 4: Simplify right side
    51,128.80x = 3,117,205,859.33
  5. Step 5: Solve for x
    x = 3,117,205,859.33/51,128.80
  6. Step 6: Final answer
    x = 60,967.71

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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.