Home / 257,588.05-386,109.38-86,647.04

Finding the Fourth Proportional to 257,588.05, 386,109.38 and 86,647.04

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Solution

The fourth proportional to 257,588.05, 386,109.38 and 86,647.04 is: 129,878.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,588.05 : 386,109.38 = 86,647.04 : x
  2. Step 2: Convert to fraction form
    257,588.05/386,109.38 = 86,647.04/x
  3. Step 3: Cross multiply
    257,588.05x = 386,109.38 × 86,647.04
  4. Step 4: Simplify right side
    257,588.05x = 33,455,234,460.00
  5. Step 5: Solve for x
    x = 33,455,234,460.00/257,588.05
  6. Step 6: Final answer
    x = 129,878.83

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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.