Home / 85,500.20-128,250.30-72,214.18

Finding the Fourth Proportional to 85,500.20, 128,250.30 and 72,214.18

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Solution

The fourth proportional to 85,500.20, 128,250.30 and 72,214.18 is: 108,321.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,500.20 : 128,250.30 = 72,214.18 : x
  2. Step 2: Convert to fraction form
    85,500.20/128,250.30 = 72,214.18/x
  3. Step 3: Cross multiply
    85,500.20x = 128,250.30 × 72,214.18
  4. Step 4: Simplify right side
    85,500.20x = 9,261,489,608.00
  5. Step 5: Solve for x
    x = 9,261,489,608.00/85,500.20
  6. Step 6: Final answer
    x = 108,321.26

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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.