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Finding the Fourth Proportional to 120,801.60, 181,202.40 and 74,080.80

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Solution

The fourth proportional to 120,801.60, 181,202.40 and 74,080.80 is: 111,121.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,801.60 : 181,202.40 = 74,080.80 : x
  2. Step 2: Convert to fraction form
    120,801.60/181,202.40 = 74,080.80/x
  3. Step 3: Cross multiply
    120,801.60x = 181,202.40 × 74,080.80
  4. Step 4: Simplify right side
    120,801.60x = 13,423,618,753.92
  5. Step 5: Solve for x
    x = 13,423,618,753.92/120,801.60
  6. Step 6: Final answer
    x = 111,121.20

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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.