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Finding the Fourth Proportional to 212,933.60, 319,285.20 and 88,287.20

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Solution

The fourth proportional to 212,933.60, 319,285.20 and 88,287.20 is: 132,383.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,933.60 : 319,285.20 = 88,287.20 : x
  2. Step 2: Convert to fraction form
    212,933.60/319,285.20 = 88,287.20/x
  3. Step 3: Cross multiply
    212,933.60x = 319,285.20 × 88,287.20
  4. Step 4: Simplify right side
    212,933.60x = 28,188,796,309.44
  5. Step 5: Solve for x
    x = 28,188,796,309.44/212,933.60
  6. Step 6: Final answer
    x = 132,383.04

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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.