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Finding the Fourth Proportional to 231,428.01, 347,185.80 and 81,651.30

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Solution

The fourth proportional to 231,428.01, 347,185.80 and 81,651.30 is: 122,492.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,428.01 : 347,185.80 = 81,651.30 : x
  2. Step 2: Convert to fraction form
    231,428.01/347,185.80 = 81,651.30/x
  3. Step 3: Cross multiply
    231,428.01x = 347,185.80 × 81,651.30
  4. Step 4: Simplify right side
    231,428.01x = 28,348,171,911.54
  5. Step 5: Solve for x
    x = 28,348,171,911.54/231,428.01
  6. Step 6: Final answer
    x = 122,492.40

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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.