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Finding the Fourth Proportional to 120,830.40, 181,245.60 and 119,080.80

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Solution

The fourth proportional to 120,830.40, 181,245.60 and 119,080.80 is: 178,621.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,830.40 : 181,245.60 = 119,080.80 : x
  2. Step 2: Convert to fraction form
    120,830.40/181,245.60 = 119,080.80/x
  3. Step 3: Cross multiply
    120,830.40x = 181,245.60 × 119,080.80
  4. Step 4: Simplify right side
    120,830.40x = 21,582,871,044.48
  5. Step 5: Solve for x
    x = 21,582,871,044.48/120,830.40
  6. Step 6: Final answer
    x = 178,621.20

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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.