Home / 78,971.14-108,904.78-51,706.54

Finding the Fourth Proportional to 78,971.14, 108,904.78 and 51,706.54

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Solution

The fourth proportional to 78,971.14, 108,904.78 and 51,706.54 is: 71,305.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,971.14 : 108,904.78 = 51,706.54 : x
  2. Step 2: Convert to fraction form
    78,971.14/108,904.78 = 51,706.54/x
  3. Step 3: Cross multiply
    78,971.14x = 108,904.78 × 51,706.54
  4. Step 4: Simplify right side
    78,971.14x = 5,631,089,363.26
  5. Step 5: Solve for x
    x = 5,631,089,363.26/78,971.14
  6. Step 6: Final answer
    x = 71,305.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.