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Finding the Fourth Proportional to 351,990.72, 527,943.20 and 102,672.96

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Solution

The fourth proportional to 351,990.72, 527,943.20 and 102,672.96 is: 153,996.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,990.72 : 527,943.20 = 102,672.96 : x
  2. Step 2: Convert to fraction form
    351,990.72/527,943.20 = 102,672.96/x
  3. Step 3: Cross multiply
    351,990.72x = 527,943.20 × 102,672.96
  4. Step 4: Simplify right side
    351,990.72x = 54,205,491,055.87
  5. Step 5: Solve for x
    x = 54,205,491,055.87/351,990.72
  6. Step 6: Final answer
    x = 153,996.93

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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.