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Finding the Fourth Proportional to 218,889.52, 328,361.15 and 74,819.17

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Solution

The fourth proportional to 218,889.52, 328,361.15 and 74,819.17 is: 112,237.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,889.52 : 328,361.15 = 74,819.17 : x
  2. Step 2: Convert to fraction form
    218,889.52/328,361.15 = 74,819.17/x
  3. Step 3: Cross multiply
    218,889.52x = 328,361.15 × 74,819.17
  4. Step 4: Simplify right side
    218,889.52x = 24,567,708,069.39
  5. Step 5: Solve for x
    x = 24,567,708,069.39/218,889.52
  6. Step 6: Final answer
    x = 112,237.94

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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.