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Finding the Fourth Proportional to 84,615.92, 126,790.34 and 31,234.41

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Solution

The fourth proportional to 84,615.92, 126,790.34 and 31,234.41 is: 46,802.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,615.92 : 126,790.34 = 31,234.41 : x
  2. Step 2: Convert to fraction form
    84,615.92/126,790.34 = 31,234.41/x
  3. Step 3: Cross multiply
    84,615.92x = 126,790.34 × 31,234.41
  4. Step 4: Simplify right side
    84,615.92x = 3,960,221,307.43
  5. Step 5: Solve for x
    x = 3,960,221,307.43/84,615.92
  6. Step 6: Final answer
    x = 46,802.32

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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.