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Finding the Fourth Proportional to 315,046.92, 472,569.36 and 78,389.56

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Solution

The fourth proportional to 315,046.92, 472,569.36 and 78,389.56 is: 117,584.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,046.92 : 472,569.36 = 78,389.56 : x
  2. Step 2: Convert to fraction form
    315,046.92/472,569.36 = 78,389.56/x
  3. Step 3: Cross multiply
    315,046.92x = 472,569.36 × 78,389.56
  4. Step 4: Simplify right side
    315,046.92x = 37,044,504,199.88
  5. Step 5: Solve for x
    x = 37,044,504,199.88/315,046.92
  6. Step 6: Final answer
    x = 117,584.09

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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.