Home / 212,817.20-319,063.80-107,711.60

Finding the Fourth Proportional to 212,817.20, 319,063.80 and 107,711.60

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Solution

The fourth proportional to 212,817.20, 319,063.80 and 107,711.60 is: 161,485.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,817.20 : 319,063.80 = 107,711.60 : x
  2. Step 2: Convert to fraction form
    212,817.20/319,063.80 = 107,711.60/x
  3. Step 3: Cross multiply
    212,817.20x = 319,063.80 × 107,711.60
  4. Step 4: Simplify right side
    212,817.20x = 34,366,872,400.08
  5. Step 5: Solve for x
    x = 34,366,872,400.08/212,817.20
  6. Step 6: Final answer
    x = 161,485.41

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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.