Home / 209,789.24-289,530.05-128,112.98

Finding the Fourth Proportional to 209,789.24, 289,530.05 and 128,112.98

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Solution

The fourth proportional to 209,789.24, 289,530.05 and 128,112.98 is: 176,808.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,789.24 : 289,530.05 = 128,112.98 : x
  2. Step 2: Convert to fraction form
    209,789.24/289,530.05 = 128,112.98/x
  3. Step 3: Cross multiply
    209,789.24x = 289,530.05 × 128,112.98
  4. Step 4: Simplify right side
    209,789.24x = 37,092,555,416.83
  5. Step 5: Solve for x
    x = 37,092,555,416.83/209,789.24
  6. Step 6: Final answer
    x = 176,808.67

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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.