Home / 209,849.13-289,520.73-128,147.57

Finding the Fourth Proportional to 209,849.13, 289,520.73 and 128,147.57

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Solution

The fourth proportional to 209,849.13, 289,520.73 and 128,147.57 is: 176,800.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,849.13 : 289,520.73 = 128,147.57 : x
  2. Step 2: Convert to fraction form
    209,849.13/289,520.73 = 128,147.57/x
  3. Step 3: Cross multiply
    209,849.13x = 289,520.73 × 128,147.57
  4. Step 4: Simplify right side
    209,849.13x = 37,101,377,652.23
  5. Step 5: Solve for x
    x = 37,101,377,652.23/209,849.13
  6. Step 6: Final answer
    x = 176,800.25

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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.