Home / 136,964.96-189,030.41-78,820.49

Finding the Fourth Proportional to 136,964.96, 189,030.41 and 78,820.49

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Solution

The fourth proportional to 136,964.96, 189,030.41 and 78,820.49 is: 108,783.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,964.96 : 189,030.41 = 78,820.49 : x
  2. Step 2: Convert to fraction form
    136,964.96/189,030.41 = 78,820.49/x
  3. Step 3: Cross multiply
    136,964.96x = 189,030.41 × 78,820.49
  4. Step 4: Simplify right side
    136,964.96x = 14,899,469,541.10
  5. Step 5: Solve for x
    x = 14,899,469,541.10/136,964.96
  6. Step 6: Final answer
    x = 108,783.08

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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.