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Finding the Fourth Proportional to 212,890.60, 319,220.70 and 88,244.20

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Solution

The fourth proportional to 212,890.60, 319,220.70 and 88,244.20 is: 132,318.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,890.60 : 319,220.70 = 88,244.20 : x
  2. Step 2: Convert to fraction form
    212,890.60/319,220.70 = 88,244.20/x
  3. Step 3: Cross multiply
    212,890.60x = 319,220.70 × 88,244.20
  4. Step 4: Simplify right side
    212,890.60x = 28,169,375,294.94
  5. Step 5: Solve for x
    x = 28,169,375,294.94/212,890.60
  6. Step 6: Final answer
    x = 132,318.55

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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.