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Finding the Fourth Proportional to 120,765.60, 181,180.80 and 107,708.40

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Solution

The fourth proportional to 120,765.60, 181,180.80 and 107,708.40 is: 161,591.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,765.60 : 181,180.80 = 107,708.40 : x
  2. Step 2: Convert to fraction form
    120,765.60/181,180.80 = 107,708.40/x
  3. Step 3: Cross multiply
    120,765.60x = 181,180.80 × 107,708.40
  4. Step 4: Simplify right side
    120,765.60x = 19,514,694,078.72
  5. Step 5: Solve for x
    x = 19,514,694,078.72/120,765.60
  6. Step 6: Final answer
    x = 161,591.50

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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.