Home / 85,520.39-128,226.24-75,011.51

Finding the Fourth Proportional to 85,520.39, 128,226.24 and 75,011.51

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Solution

The fourth proportional to 85,520.39, 128,226.24 and 75,011.51 is: 112,469.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,520.39 : 128,226.24 = 75,011.51 : x
  2. Step 2: Convert to fraction form
    85,520.39/128,226.24 = 75,011.51/x
  3. Step 3: Cross multiply
    85,520.39x = 128,226.24 × 75,011.51
  4. Step 4: Simplify right side
    85,520.39x = 9,618,444,204.59
  5. Step 5: Solve for x
    x = 9,618,444,204.59/85,520.39
  6. Step 6: Final answer
    x = 112,469.61

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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.