Home / 212,780.80-319,171.20-72,697.60

Finding the Fourth Proportional to 212,780.80, 319,171.20 and 72,697.60

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Solution

The fourth proportional to 212,780.80, 319,171.20 and 72,697.60 is: 109,046.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,780.80 : 319,171.20 = 72,697.60 : x
  2. Step 2: Convert to fraction form
    212,780.80/319,171.20 = 72,697.60/x
  3. Step 3: Cross multiply
    212,780.80x = 319,171.20 × 72,697.60
  4. Step 4: Simplify right side
    212,780.80x = 23,202,980,229.12
  5. Step 5: Solve for x
    x = 23,202,980,229.12/212,780.80
  6. Step 6: Final answer
    x = 109,046.40

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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.