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Finding the Fourth Proportional to 85,080.75, 127,607.12 and 31,758.73

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Solution

The fourth proportional to 85,080.75, 127,607.12 and 31,758.73 is: 47,632.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,080.75 : 127,607.12 = 31,758.73 : x
  2. Step 2: Convert to fraction form
    85,080.75/127,607.12 = 31,758.73/x
  3. Step 3: Cross multiply
    85,080.75x = 127,607.12 × 31,758.73
  4. Step 4: Simplify right side
    85,080.75x = 4,052,640,518.55
  5. Step 5: Solve for x
    x = 4,052,640,518.55/85,080.75
  6. Step 6: Final answer
    x = 47,632.87

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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.