Home / 126,143.58-189,001.26-76,118.58

Finding the Fourth Proportional to 126,143.58, 189,001.26 and 76,118.58

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Solution

The fourth proportional to 126,143.58, 189,001.26 and 76,118.58 is: 114,048.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,143.58 : 189,001.26 = 76,118.58 : x
  2. Step 2: Convert to fraction form
    126,143.58/189,001.26 = 76,118.58/x
  3. Step 3: Cross multiply
    126,143.58x = 189,001.26 × 76,118.58
  4. Step 4: Simplify right side
    126,143.58x = 14,386,507,529.41
  5. Step 5: Solve for x
    x = 14,386,507,529.41/126,143.58
  6. Step 6: Final answer
    x = 114,048.67

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1.5x scale

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.