Home / 136,963.96-189,029.03-78,819.49

Finding the Fourth Proportional to 136,963.96, 189,029.03 and 78,819.49

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Solution

The fourth proportional to 136,963.96, 189,029.03 and 78,819.49 is: 108,781.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,963.96 : 189,029.03 = 78,819.49 : x
  2. Step 2: Convert to fraction form
    136,963.96/189,029.03 = 78,819.49/x
  3. Step 3: Cross multiply
    136,963.96x = 189,029.03 × 78,819.49
  4. Step 4: Simplify right side
    136,963.96x = 14,899,171,739.79
  5. Step 5: Solve for x
    x = 14,899,171,739.79/136,963.96
  6. Step 6: Final answer
    x = 108,781.70

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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.