Home / 85,147.20-127,720.80-40,751.10

Finding the Fourth Proportional to 85,147.20, 127,720.80 and 40,751.10

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Solution

The fourth proportional to 85,147.20, 127,720.80 and 40,751.10 is: 61,126.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,147.20 : 127,720.80 = 40,751.10 : x
  2. Step 2: Convert to fraction form
    85,147.20/127,720.80 = 40,751.10/x
  3. Step 3: Cross multiply
    85,147.20x = 127,720.80 × 40,751.10
  4. Step 4: Simplify right side
    85,147.20x = 5,204,763,092.88
  5. Step 5: Solve for x
    x = 5,204,763,092.88/85,147.20
  6. Step 6: Final answer
    x = 61,126.65

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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.