Home / 85,520.45-128,226.34-75,011.57

Finding the Fourth Proportional to 85,520.45, 128,226.34 and 75,011.57

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Solution

The fourth proportional to 85,520.45, 128,226.34 and 75,011.57 is: 112,469.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,520.45 : 128,226.34 = 75,011.57 : x
  2. Step 2: Convert to fraction form
    85,520.45/128,226.34 = 75,011.57/x
  3. Step 3: Cross multiply
    85,520.45x = 128,226.34 × 75,011.57
  4. Step 4: Simplify right side
    85,520.45x = 9,618,459,078.75
  5. Step 5: Solve for x
    x = 9,618,459,078.75/85,520.45
  6. Step 6: Final answer
    x = 112,469.70

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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.