Home / 420,164.20-630,159.84-120,578

Finding the Fourth Proportional to 420,164.20, 630,159.84 and 120,578

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Solution

The fourth proportional to 420,164.20, 630,159.84 and 120,578 is: 180,842.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,164.20 : 630,159.84 = 120,578 : x
  2. Step 2: Convert to fraction form
    420,164.20/630,159.84 = 120,578/x
  3. Step 3: Cross multiply
    420,164.20x = 630,159.84 × 120,578
  4. Step 4: Simplify right side
    420,164.20x = 75,983,412,584.63
  5. Step 5: Solve for x
    x = 75,983,412,584.63/420,164.20
  6. Step 6: Final answer
    x = 180,842.19

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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.