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Finding the Fourth Proportional to 218,115.96, 326,940.66 and 99,609.72

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Solution

The fourth proportional to 218,115.96, 326,940.66 and 99,609.72 is: 149,308.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,115.96 : 326,940.66 = 99,609.72 : x
  2. Step 2: Convert to fraction form
    218,115.96/326,940.66 = 99,609.72/x
  3. Step 3: Cross multiply
    218,115.96x = 326,940.66 × 99,609.72
  4. Step 4: Simplify right side
    218,115.96x = 32,566,467,599.22
  5. Step 5: Solve for x
    x = 32,566,467,599.22/218,115.96
  6. Step 6: Final answer
    x = 149,308.05

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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.