Home / 218,917.61-328,376.42-100,688.39

Finding the Fourth Proportional to 218,917.61, 328,376.42 and 100,688.39

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Solution

The fourth proportional to 218,917.61, 328,376.42 and 100,688.39 is: 151,032.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,917.61 : 328,376.42 = 100,688.39 : x
  2. Step 2: Convert to fraction form
    218,917.61/328,376.42 = 100,688.39/x
  3. Step 3: Cross multiply
    218,917.61x = 328,376.42 × 100,688.39
  4. Step 4: Simplify right side
    218,917.61x = 33,063,690,898.44
  5. Step 5: Solve for x
    x = 33,063,690,898.44/218,917.61
  6. Step 6: Final answer
    x = 151,032.58

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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.