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Finding the Fourth Proportional to 212,959.80, 319,183.70 and 88,236.60

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Solution

The fourth proportional to 212,959.80, 319,183.70 and 88,236.60 is: 132,248.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,959.80 : 319,183.70 = 88,236.60 : x
  2. Step 2: Convert to fraction form
    212,959.80/319,183.70 = 88,236.60/x
  3. Step 3: Cross multiply
    212,959.80x = 319,183.70 × 88,236.60
  4. Step 4: Simplify right side
    212,959.80x = 28,163,684,463.42
  5. Step 5: Solve for x
    x = 28,163,684,463.42/212,959.80
  6. Step 6: Final answer
    x = 132,248.83

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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.