Home / 209,174.60-288,667.32-128,649.44

Finding the Fourth Proportional to 209,174.60, 288,667.32 and 128,649.44

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Solution

The fourth proportional to 209,174.60, 288,667.32 and 128,649.44 is: 177,540.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,174.60 : 288,667.32 = 128,649.44 : x
  2. Step 2: Convert to fraction form
    209,174.60/288,667.32 = 128,649.44/x
  3. Step 3: Cross multiply
    209,174.60x = 288,667.32 × 128,649.44
  4. Step 4: Simplify right side
    209,174.60x = 37,136,889,064.30
  5. Step 5: Solve for x
    x = 37,136,889,064.30/209,174.60
  6. Step 6: Final answer
    x = 177,540.15

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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.