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Finding the Fourth Proportional to 219,428.43, 328,945.59 and 79,154.25

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Solution

The fourth proportional to 219,428.43, 328,945.59 and 79,154.25 is: 118,660.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,428.43 : 328,945.59 = 79,154.25 : x
  2. Step 2: Convert to fraction form
    219,428.43/328,945.59 = 79,154.25/x
  3. Step 3: Cross multiply
    219,428.43x = 328,945.59 × 79,154.25
  4. Step 4: Simplify right side
    219,428.43x = 26,037,441,467.26
  5. Step 5: Solve for x
    x = 26,037,441,467.26/219,428.43
  6. Step 6: Final answer
    x = 118,660.29

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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.