Home / 85,315.20-127,972.80-57,321.60

Finding the Fourth Proportional to 85,315.20, 127,972.80 and 57,321.60

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Solution

The fourth proportional to 85,315.20, 127,972.80 and 57,321.60 is: 85,982.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,315.20 : 127,972.80 = 57,321.60 : x
  2. Step 2: Convert to fraction form
    85,315.20/127,972.80 = 57,321.60/x
  3. Step 3: Cross multiply
    85,315.20x = 127,972.80 × 57,321.60
  4. Step 4: Simplify right side
    85,315.20x = 7,335,605,652.48
  5. Step 5: Solve for x
    x = 7,335,605,652.48/85,315.20
  6. Step 6: Final answer
    x = 85,982.40

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Similar ratio
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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.