Home / 257,638.05-386,498.34-80,186.04

Finding the Fourth Proportional to 257,638.05, 386,498.34 and 80,186.04

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Solution

The fourth proportional to 257,638.05, 386,498.34 and 80,186.04 is: 120,291.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,638.05 : 386,498.34 = 80,186.04 : x
  2. Step 2: Convert to fraction form
    257,638.05/386,498.34 = 80,186.04/x
  3. Step 3: Cross multiply
    257,638.05x = 386,498.34 × 80,186.04
  4. Step 4: Simplify right side
    257,638.05x = 30,991,771,351.17
  5. Step 5: Solve for x
    x = 30,991,771,351.17/257,638.05
  6. Step 6: Final answer
    x = 120,291.90

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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.