Home / 85,015.20-127,517.40-28,855.20

Finding the Fourth Proportional to 85,015.20, 127,517.40 and 28,855.20

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Solution

The fourth proportional to 85,015.20, 127,517.40 and 28,855.20 is: 43,280.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,015.20 : 127,517.40 = 28,855.20 : x
  2. Step 2: Convert to fraction form
    85,015.20/127,517.40 = 28,855.20/x
  3. Step 3: Cross multiply
    85,015.20x = 127,517.40 × 28,855.20
  4. Step 4: Simplify right side
    85,015.20x = 3,679,540,080.48
  5. Step 5: Solve for x
    x = 3,679,540,080.48/85,015.20
  6. Step 6: Final answer
    x = 43,280.97

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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.