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Finding the Fourth Proportional to 420,097.88, 630,240.50 and 120,555.11

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Solution

The fourth proportional to 420,097.88, 630,240.50 and 120,555.11 is: 180,859.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,097.88 : 630,240.50 = 120,555.11 : x
  2. Step 2: Convert to fraction form
    420,097.88/630,240.50 = 120,555.11/x
  3. Step 3: Cross multiply
    420,097.88x = 630,240.50 × 120,555.11
  4. Step 4: Simplify right side
    420,097.88x = 75,978,714,680.94
  5. Step 5: Solve for x
    x = 75,978,714,680.94/420,097.88
  6. Step 6: Final answer
    x = 180,859.55

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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.