Home / 209,656.20-289,317.72-128,120.79

Finding the Fourth Proportional to 209,656.20, 289,317.72 and 128,120.79

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Solution

The fourth proportional to 209,656.20, 289,317.72 and 128,120.79 is: 176,801.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,656.20 : 289,317.72 = 128,120.79 : x
  2. Step 2: Convert to fraction form
    209,656.20/289,317.72 = 128,120.79/x
  3. Step 3: Cross multiply
    209,656.20x = 289,317.72 × 128,120.79
  4. Step 4: Simplify right side
    209,656.20x = 37,067,614,847.40
  5. Step 5: Solve for x
    x = 37,067,614,847.40/209,656.20
  6. Step 6: Final answer
    x = 176,801.90

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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.