Home / 78,738.41-118,662.03-71,252.06

Finding the Fourth Proportional to 78,738.41, 118,662.03 and 71,252.06

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Solution

The fourth proportional to 78,738.41, 118,662.03 and 71,252.06 is: 107,379.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,738.41 : 118,662.03 = 71,252.06 : x
  2. Step 2: Convert to fraction form
    78,738.41/118,662.03 = 71,252.06/x
  3. Step 3: Cross multiply
    78,738.41x = 118,662.03 × 71,252.06
  4. Step 4: Simplify right side
    78,738.41x = 8,454,913,487.97
  5. Step 5: Solve for x
    x = 8,454,913,487.97/78,738.41
  6. Step 6: Final answer
    x = 107,379.78

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.