Home / 78,400.15-108,237.06-51,620.49

Finding the Fourth Proportional to 78,400.15, 108,237.06 and 51,620.49

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Solution

The fourth proportional to 78,400.15, 108,237.06 and 51,620.49 is: 71,265.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,400.15 : 108,237.06 = 51,620.49 : x
  2. Step 2: Convert to fraction form
    78,400.15/108,237.06 = 51,620.49/x
  3. Step 3: Cross multiply
    78,400.15x = 108,237.06 × 51,620.49
  4. Step 4: Simplify right side
    78,400.15x = 5,587,250,073.36
  5. Step 5: Solve for x
    x = 5,587,250,073.36/78,400.15
  6. Step 6: Final answer
    x = 71,265.81

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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.