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Finding the Fourth Proportional to 31,418.79, 47,128.79 and 25,149.70

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Solution

The fourth proportional to 31,418.79, 47,128.79 and 25,149.70 is: 37,725.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,418.79 : 47,128.79 = 25,149.70 : x
  2. Step 2: Convert to fraction form
    31,418.79/47,128.79 = 25,149.70/x
  3. Step 3: Cross multiply
    31,418.79x = 47,128.79 × 25,149.70
  4. Step 4: Simplify right side
    31,418.79x = 1,185,274,929.86
  5. Step 5: Solve for x
    x = 1,185,274,929.86/31,418.79
  6. Step 6: Final answer
    x = 37,725.03

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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.