Home / 78,911.25-108,896.87-43,101.28

Finding the Fourth Proportional to 78,911.25, 108,896.87 and 43,101.28

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Solution

The fourth proportional to 78,911.25, 108,896.87 and 43,101.28 is: 59,479.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,911.25 : 108,896.87 = 43,101.28 : x
  2. Step 2: Convert to fraction form
    78,911.25/108,896.87 = 43,101.28/x
  3. Step 3: Cross multiply
    78,911.25x = 108,896.87 × 43,101.28
  4. Step 4: Simplify right side
    78,911.25x = 4,693,594,728.87
  5. Step 5: Solve for x
    x = 4,693,594,728.87/78,911.25
  6. Step 6: Final answer
    x = 59,479.41

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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.