Home / 51,128.20-76,692.30-45,587.80

Finding the Fourth Proportional to 51,128.20, 76,692.30 and 45,587.80

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Solution

The fourth proportional to 51,128.20, 76,692.30 and 45,587.80 is: 68,381.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,128.20 : 76,692.30 = 45,587.80 : x
  2. Step 2: Convert to fraction form
    51,128.20/76,692.30 = 45,587.80/x
  3. Step 3: Cross multiply
    51,128.20x = 76,692.30 × 45,587.80
  4. Step 4: Simplify right side
    51,128.20x = 3,496,233,233.94
  5. Step 5: Solve for x
    x = 3,496,233,233.94/51,128.20
  6. Step 6: Final answer
    x = 68,381.70

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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.