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Finding the Fourth Proportional to 120,090.80, 179,920.20 and 57,623.60

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Solution

The fourth proportional to 120,090.80, 179,920.20 and 57,623.60 is: 86,331.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,090.80 : 179,920.20 = 57,623.60 : x
  2. Step 2: Convert to fraction form
    120,090.80/179,920.20 = 57,623.60/x
  3. Step 3: Cross multiply
    120,090.80x = 179,920.20 × 57,623.60
  4. Step 4: Simplify right side
    120,090.80x = 10,367,649,636.72
  5. Step 5: Solve for x
    x = 10,367,649,636.72/120,090.80
  6. Step 6: Final answer
    x = 86,331.76

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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.