Home / 85,520.20-128,280.30-26,350.60

Finding the Fourth Proportional to 85,520.20, 128,280.30 and 26,350.60

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Solution

The fourth proportional to 85,520.20, 128,280.30 and 26,350.60 is: 39,525.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,520.20 : 128,280.30 = 26,350.60 : x
  2. Step 2: Convert to fraction form
    85,520.20/128,280.30 = 26,350.60/x
  3. Step 3: Cross multiply
    85,520.20x = 128,280.30 × 26,350.60
  4. Step 4: Simplify right side
    85,520.20x = 3,380,262,873.18
  5. Step 5: Solve for x
    x = 3,380,262,873.18/85,520.20
  6. Step 6: Final answer
    x = 39,525.90

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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.