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Finding the Fourth Proportional to 287,553.97, 431,124.67 and 109,911.25

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Solution

The fourth proportional to 287,553.97, 431,124.67 and 109,911.25 is: 164,788.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,553.97 : 431,124.67 = 109,911.25 : x
  2. Step 2: Convert to fraction form
    287,553.97/431,124.67 = 109,911.25/x
  3. Step 3: Cross multiply
    287,553.97x = 431,124.67 × 109,911.25
  4. Step 4: Simplify right side
    287,553.97x = 47,385,451,385.54
  5. Step 5: Solve for x
    x = 47,385,451,385.54/287,553.97
  6. Step 6: Final answer
    x = 164,788.03

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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.