Home / 78,478.36-108,317.34-51,623.52

Finding the Fourth Proportional to 78,478.36, 108,317.34 and 51,623.52

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Solution

The fourth proportional to 78,478.36, 108,317.34 and 51,623.52 is: 71,251.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,478.36 : 108,317.34 = 51,623.52 : x
  2. Step 2: Convert to fraction form
    78,478.36/108,317.34 = 51,623.52/x
  3. Step 3: Cross multiply
    78,478.36x = 108,317.34 × 51,623.52
  4. Step 4: Simplify right side
    78,478.36x = 5,591,722,367.84
  5. Step 5: Solve for x
    x = 5,591,722,367.84/78,478.36
  6. Step 6: Final answer
    x = 71,251.77

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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.