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Finding the Fourth Proportional to 212,891.60, 319,222.20 and 88,245.20

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Solution

The fourth proportional to 212,891.60, 319,222.20 and 88,245.20 is: 132,320.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,891.60 : 319,222.20 = 88,245.20 : x
  2. Step 2: Convert to fraction form
    212,891.60/319,222.20 = 88,245.20/x
  3. Step 3: Cross multiply
    212,891.60x = 319,222.20 × 88,245.20
  4. Step 4: Simplify right side
    212,891.60x = 28,169,826,883.44
  5. Step 5: Solve for x
    x = 28,169,826,883.44/212,891.60
  6. Step 6: Final answer
    x = 132,320.05

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1.5x scale

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.