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Finding the Fourth Proportional to 120,009.60, 179,625.60 and 106,012.80

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Solution

The fourth proportional to 120,009.60, 179,625.60 and 106,012.80 is: 158,675.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,009.60 : 179,625.60 = 106,012.80 : x
  2. Step 2: Convert to fraction form
    120,009.60/179,625.60 = 106,012.80/x
  3. Step 3: Cross multiply
    120,009.60x = 179,625.60 × 106,012.80
  4. Step 4: Simplify right side
    120,009.60x = 19,042,612,807.68
  5. Step 5: Solve for x
    x = 19,042,612,807.68/120,009.60
  6. Step 6: Final answer
    x = 158,675.75

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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.