Home / 126,505.74-189,789.75-89,138.78

Finding the Fourth Proportional to 126,505.74, 189,789.75 and 89,138.78

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Solution

The fourth proportional to 126,505.74, 189,789.75 and 89,138.78 is: 133,730.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,505.74 : 189,789.75 = 89,138.78 : x
  2. Step 2: Convert to fraction form
    126,505.74/189,789.75 = 89,138.78/x
  3. Step 3: Cross multiply
    126,505.74x = 189,789.75 × 89,138.78
  4. Step 4: Simplify right side
    126,505.74x = 16,917,626,771.51
  5. Step 5: Solve for x
    x = 16,917,626,771.51/126,505.74
  6. Step 6: Final answer
    x = 133,730.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.