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Finding the Fourth Proportional to 363,381.17, 545,108.04 and 138,930.39

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Solution

The fourth proportional to 363,381.17, 545,108.04 and 138,930.39 is: 208,409.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,381.17 : 545,108.04 = 138,930.39 : x
  2. Step 2: Convert to fraction form
    363,381.17/545,108.04 = 138,930.39/x
  3. Step 3: Cross multiply
    363,381.17x = 545,108.04 × 138,930.39
  4. Step 4: Simplify right side
    363,381.17x = 75,732,072,589.34
  5. Step 5: Solve for x
    x = 75,732,072,589.34/363,381.17
  6. Step 6: Final answer
    x = 208,409.46

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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.