Home / 209,780.19-289,606.05-163,109.61

Finding the Fourth Proportional to 209,780.19, 289,606.05 and 163,109.61

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Solution

The fourth proportional to 209,780.19, 289,606.05 and 163,109.61 is: 225,176.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,780.19 : 289,606.05 = 163,109.61 : x
  2. Step 2: Convert to fraction form
    209,780.19/289,606.05 = 163,109.61/x
  3. Step 3: Cross multiply
    209,780.19x = 289,606.05 × 163,109.61
  4. Step 4: Simplify right side
    209,780.19x = 47,237,529,869.14
  5. Step 5: Solve for x
    x = 47,237,529,869.14/209,780.19
  6. Step 6: Final answer
    x = 225,176.31

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1.5x scale

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.