Home / 85,451.12-128,155.62-38,694.68

Finding the Fourth Proportional to 85,451.12, 128,155.62 and 38,694.68

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Solution

The fourth proportional to 85,451.12, 128,155.62 and 38,694.68 is: 58,032.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,451.12 : 128,155.62 = 38,694.68 : x
  2. Step 2: Convert to fraction form
    85,451.12/128,155.62 = 38,694.68/x
  3. Step 3: Cross multiply
    85,451.12x = 128,155.62 × 38,694.68
  4. Step 4: Simplify right side
    85,451.12x = 4,958,940,706.10
  5. Step 5: Solve for x
    x = 4,958,940,706.10/85,451.12
  6. Step 6: Final answer
    x = 58,032.48

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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.