Home / 386,319.90-579,523.05-120,078.30

Finding the Fourth Proportional to 386,319.90, 579,523.05 and 120,078.30

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Solution

The fourth proportional to 386,319.90, 579,523.05 and 120,078.30 is: 180,130.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,319.90 : 579,523.05 = 120,078.30 : x
  2. Step 2: Convert to fraction form
    386,319.90/579,523.05 = 120,078.30/x
  3. Step 3: Cross multiply
    386,319.90x = 579,523.05 × 120,078.30
  4. Step 4: Simplify right side
    386,319.90x = 69,588,142,654.82
  5. Step 5: Solve for x
    x = 69,588,142,654.82/386,319.90
  6. Step 6: Final answer
    x = 180,130.88

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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.