Home / 136,811.20-188,785.08-79,439.31

Finding the Fourth Proportional to 136,811.20, 188,785.08 and 79,439.31

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Solution

The fourth proportional to 136,811.20, 188,785.08 and 79,439.31 is: 109,617.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,811.20 : 188,785.08 = 79,439.31 : x
  2. Step 2: Convert to fraction form
    136,811.20/188,785.08 = 79,439.31/x
  3. Step 3: Cross multiply
    136,811.20x = 188,785.08 × 79,439.31
  4. Step 4: Simplify right side
    136,811.20x = 14,996,956,493.49
  5. Step 5: Solve for x
    x = 14,996,956,493.49/136,811.20
  6. Step 6: Final answer
    x = 109,617.90

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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.