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Finding the Fourth Proportional to 120,986.40, 181,479.60 and 68,498.40

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Solution

The fourth proportional to 120,986.40, 181,479.60 and 68,498.40 is: 102,747.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,986.40 : 181,479.60 = 68,498.40 : x
  2. Step 2: Convert to fraction form
    120,986.40/181,479.60 = 68,498.40/x
  3. Step 3: Cross multiply
    120,986.40x = 181,479.60 × 68,498.40
  4. Step 4: Simplify right side
    120,986.40x = 12,431,062,232.64
  5. Step 5: Solve for x
    x = 12,431,062,232.64/120,986.40
  6. Step 6: Final answer
    x = 102,747.60

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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.