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Finding the Fourth Proportional to 78,828.71, 118,239.74 and 36,694.31

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Solution

The fourth proportional to 78,828.71, 118,239.74 and 36,694.31 is: 55,039.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,828.71 : 118,239.74 = 36,694.31 : x
  2. Step 2: Convert to fraction form
    78,828.71/118,239.74 = 36,694.31/x
  3. Step 3: Cross multiply
    78,828.71x = 118,239.74 × 36,694.31
  4. Step 4: Simplify right side
    78,828.71x = 4,338,725,490.41
  5. Step 5: Solve for x
    x = 4,338,725,490.41/78,828.71
  6. Step 6: Final answer
    x = 55,039.91

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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.