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Finding the Fourth Proportional to 315,760.25, 435,755.41 and 172,529.18

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Solution

The fourth proportional to 315,760.25, 435,755.41 and 172,529.18 is: 238,093.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,760.25 : 435,755.41 = 172,529.18 : x
  2. Step 2: Convert to fraction form
    315,760.25/435,755.41 = 172,529.18/x
  3. Step 3: Cross multiply
    315,760.25x = 435,755.41 × 172,529.18
  4. Step 4: Simplify right side
    315,760.25x = 75,180,520,957.76
  5. Step 5: Solve for x
    x = 75,180,520,957.76/315,760.25
  6. Step 6: Final answer
    x = 238,093.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.