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Finding the Fourth Proportional to 120,690.20, 181,208.10 and 68,202.20

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Solution

The fourth proportional to 120,690.20, 181,208.10 and 68,202.20 is: 102,400.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,690.20 : 181,208.10 = 68,202.20 : x
  2. Step 2: Convert to fraction form
    120,690.20/181,208.10 = 68,202.20/x
  3. Step 3: Cross multiply
    120,690.20x = 181,208.10 × 68,202.20
  4. Step 4: Simplify right side
    120,690.20x = 12,358,791,077.82
  5. Step 5: Solve for x
    x = 12,358,791,077.82/120,690.20
  6. Step 6: Final answer
    x = 102,400.95

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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.