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Finding the Fourth Proportional to 281,212.60, 421,818.90 and 91,672.60

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Solution

The fourth proportional to 281,212.60, 421,818.90 and 91,672.60 is: 137,508.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,212.60 : 421,818.90 = 91,672.60 : x
  2. Step 2: Convert to fraction form
    281,212.60/421,818.90 = 91,672.60/x
  3. Step 3: Cross multiply
    281,212.60x = 421,818.90 × 91,672.60
  4. Step 4: Simplify right side
    281,212.60x = 38,669,235,292.14
  5. Step 5: Solve for x
    x = 38,669,235,292.14/281,212.60
  6. Step 6: Final answer
    x = 137,508.90

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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.