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Finding the Fourth Proportional to 85,242.87, 127,859.67 and 26,078.55

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Solution

The fourth proportional to 85,242.87, 127,859.67 and 26,078.55 is: 39,116.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,242.87 : 127,859.67 = 26,078.55 : x
  2. Step 2: Convert to fraction form
    85,242.87/127,859.67 = 26,078.55/x
  3. Step 3: Cross multiply
    85,242.87x = 127,859.67 × 26,078.55
  4. Step 4: Simplify right side
    85,242.87x = 3,334,394,797.08
  5. Step 5: Solve for x
    x = 3,334,394,797.08/85,242.87
  6. Step 6: Final answer
    x = 39,116.41

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1.5x scale

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.