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Finding the Fourth Proportional to 281,165.39, 421,704.78 and 91,625.30

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Solution

The fourth proportional to 281,165.39, 421,704.78 and 91,625.30 is: 137,423.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,165.39 : 421,704.78 = 91,625.30 : x
  2. Step 2: Convert to fraction form
    281,165.39/421,704.78 = 91,625.30/x
  3. Step 3: Cross multiply
    281,165.39x = 421,704.78 × 91,625.30
  4. Step 4: Simplify right side
    281,165.39x = 38,638,824,870.41
  5. Step 5: Solve for x
    x = 38,638,824,870.41/281,165.39
  6. Step 6: Final answer
    x = 137,423.83

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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.