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Finding the Fourth Proportional to 363,991.88, 545,729.18 and 139,162.76

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Solution

The fourth proportional to 363,991.88, 545,729.18 and 139,162.76 is: 208,645.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,991.88 : 545,729.18 = 139,162.76 : x
  2. Step 2: Convert to fraction form
    363,991.88/545,729.18 = 139,162.76/x
  3. Step 3: Cross multiply
    363,991.88x = 545,729.18 × 139,162.76
  4. Step 4: Simplify right side
    363,991.88x = 75,945,178,901.34
  5. Step 5: Solve for x
    x = 75,945,178,901.34/363,991.88
  6. Step 6: Final answer
    x = 208,645.26

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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.