Home / 135,383.36-186,878.10-78,794.73

Finding the Fourth Proportional to 135,383.36, 186,878.10 and 78,794.73

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Solution

The fourth proportional to 135,383.36, 186,878.10 and 78,794.73 is: 108,765.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,383.36 : 186,878.10 = 78,794.73 : x
  2. Step 2: Convert to fraction form
    135,383.36/186,878.10 = 78,794.73/x
  3. Step 3: Cross multiply
    135,383.36x = 186,878.10 × 78,794.73
  4. Step 4: Simplify right side
    135,383.36x = 14,725,009,727.89
  5. Step 5: Solve for x
    x = 14,725,009,727.89/135,383.36
  6. Step 6: Final answer
    x = 108,765.29

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1.5x scale

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.