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Finding the Fourth Proportional to 120,906.60, 181,359.90 and 42,028.80

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Solution

The fourth proportional to 120,906.60, 181,359.90 and 42,028.80 is: 63,043.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,906.60 : 181,359.90 = 42,028.80 : x
  2. Step 2: Convert to fraction form
    120,906.60/181,359.90 = 42,028.80/x
  3. Step 3: Cross multiply
    120,906.60x = 181,359.90 × 42,028.80
  4. Step 4: Simplify right side
    120,906.60x = 7,622,338,965.12
  5. Step 5: Solve for x
    x = 7,622,338,965.12/120,906.60
  6. Step 6: Final answer
    x = 63,043.20

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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.