Home / 209,786.23-289,525.90-128,109.98

Finding the Fourth Proportional to 209,786.23, 289,525.90 and 128,109.98

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Solution

The fourth proportional to 209,786.23, 289,525.90 and 128,109.98 is: 176,804.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,786.23 : 289,525.90 = 128,109.98 : x
  2. Step 2: Convert to fraction form
    209,786.23/289,525.90 = 128,109.98/x
  3. Step 3: Cross multiply
    209,786.23x = 289,525.90 × 128,109.98
  4. Step 4: Simplify right side
    209,786.23x = 37,091,155,490.58
  5. Step 5: Solve for x
    x = 37,091,155,490.58/209,786.23
  6. Step 6: Final answer
    x = 176,804.53

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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.