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Finding the Fourth Proportional to 120,830.60, 181,245.90 and 75,924.20

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Solution

The fourth proportional to 120,830.60, 181,245.90 and 75,924.20 is: 113,886.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,830.60 : 181,245.90 = 75,924.20 : x
  2. Step 2: Convert to fraction form
    120,830.60/181,245.90 = 75,924.20/x
  3. Step 3: Cross multiply
    120,830.60x = 181,245.90 × 75,924.20
  4. Step 4: Simplify right side
    120,830.60x = 13,760,949,960.78
  5. Step 5: Solve for x
    x = 13,760,949,960.78/120,830.60
  6. Step 6: Final answer
    x = 113,886.30

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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.