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Finding the Fourth Proportional to 212,766.60, 319,034.70 and 88,120.20

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Solution

The fourth proportional to 212,766.60, 319,034.70 and 88,120.20 is: 132,132.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,766.60 : 319,034.70 = 88,120.20 : x
  2. Step 2: Convert to fraction form
    212,766.60/319,034.70 = 88,120.20/x
  3. Step 3: Cross multiply
    212,766.60x = 319,034.70 × 88,120.20
  4. Step 4: Simplify right side
    212,766.60x = 28,113,401,570.94
  5. Step 5: Solve for x
    x = 28,113,401,570.94/212,766.60
  6. Step 6: Final answer
    x = 132,132.59

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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.