Home / 136,964.19-189,029.34-78,819.72

Finding the Fourth Proportional to 136,964.19, 189,029.34 and 78,819.72

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Solution

The fourth proportional to 136,964.19, 189,029.34 and 78,819.72 is: 108,782.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,964.19 : 189,029.34 = 78,819.72 : x
  2. Step 2: Convert to fraction form
    136,964.19/189,029.34 = 78,819.72/x
  3. Step 3: Cross multiply
    136,964.19x = 189,029.34 × 78,819.72
  4. Step 4: Simplify right side
    136,964.19x = 14,899,239,650.58
  5. Step 5: Solve for x
    x = 14,899,239,650.58/136,964.19
  6. Step 6: Final answer
    x = 108,782.01

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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.