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Finding the Fourth Proportional to 85,118.85, 127,756.98 and 43,028.55

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Solution

The fourth proportional to 85,118.85, 127,756.98 and 43,028.55 is: 64,582.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,118.85 : 127,756.98 = 43,028.55 : x
  2. Step 2: Convert to fraction form
    85,118.85/127,756.98 = 43,028.55/x
  3. Step 3: Cross multiply
    85,118.85x = 127,756.98 × 43,028.55
  4. Step 4: Simplify right side
    85,118.85x = 5,497,197,601.78
  5. Step 5: Solve for x
    x = 5,497,197,601.78/85,118.85
  6. Step 6: Final answer
    x = 64,582.61

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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.