Home / 78,921.90-108,914.57-43,112.51

Finding the Fourth Proportional to 78,921.90, 108,914.57 and 43,112.51

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Solution

The fourth proportional to 78,921.90, 108,914.57 and 43,112.51 is: 59,496.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,921.90 : 108,914.57 = 43,112.51 : x
  2. Step 2: Convert to fraction form
    78,921.90/108,914.57 = 43,112.51/x
  3. Step 3: Cross multiply
    78,921.90x = 108,914.57 × 43,112.51
  4. Step 4: Simplify right side
    78,921.90x = 4,695,579,728.14
  5. Step 5: Solve for x
    x = 4,695,579,728.14/78,921.90
  6. Step 6: Final answer
    x = 59,496.54

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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.