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Finding the Fourth Proportional to 85,289.75, 127,871.44 and 40,874.21

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Solution

The fourth proportional to 85,289.75, 127,871.44 and 40,874.21 is: 61,281.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,289.75 : 127,871.44 = 40,874.21 : x
  2. Step 2: Convert to fraction form
    85,289.75/127,871.44 = 40,874.21/x
  3. Step 3: Cross multiply
    85,289.75x = 127,871.44 × 40,874.21
  4. Step 4: Simplify right side
    85,289.75x = 5,226,643,350.02
  5. Step 5: Solve for x
    x = 5,226,643,350.02/85,289.75
  6. Step 6: Final answer
    x = 61,281.03

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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.