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Finding the Fourth Proportional to 85,271.20, 127,943.62 and 45,782.20

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Solution

The fourth proportional to 85,271.20, 127,943.62 and 45,782.20 is: 68,693.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,271.20 : 127,943.62 = 45,782.20 : x
  2. Step 2: Convert to fraction form
    85,271.20/127,943.62 = 45,782.20/x
  3. Step 3: Cross multiply
    85,271.20x = 127,943.62 × 45,782.20
  4. Step 4: Simplify right side
    85,271.20x = 5,857,540,399.56
  5. Step 5: Solve for x
    x = 5,857,540,399.56/85,271.20
  6. Step 6: Final answer
    x = 68,693.07

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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.