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Finding the Fourth Proportional to 212,906.60, 319,244.70 and 88,260.20

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Solution

The fourth proportional to 212,906.60, 319,244.70 and 88,260.20 is: 132,342.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,906.60 : 319,244.70 = 88,260.20 : x
  2. Step 2: Convert to fraction form
    212,906.60/319,244.70 = 88,260.20/x
  3. Step 3: Cross multiply
    212,906.60x = 319,244.70 × 88,260.20
  4. Step 4: Simplify right side
    212,906.60x = 28,176,601,070.94
  5. Step 5: Solve for x
    x = 28,176,601,070.94/212,906.60
  6. Step 6: Final answer
    x = 132,342.54

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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.