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Finding the Fourth Proportional to 214,701.60, 321,930.90 and 81,586.20

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Solution

The fourth proportional to 214,701.60, 321,930.90 and 81,586.20 is: 122,333.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,701.60 : 321,930.90 = 81,586.20 : x
  2. Step 2: Convert to fraction form
    214,701.60/321,930.90 = 81,586.20/x
  3. Step 3: Cross multiply
    214,701.60x = 321,930.90 × 81,586.20
  4. Step 4: Simplify right side
    214,701.60x = 26,265,118,793.58
  5. Step 5: Solve for x
    x = 26,265,118,793.58/214,701.60
  6. Step 6: Final answer
    x = 122,333.13

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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.