Home / 209,118.69-288,436.01-128,591.73

Finding the Fourth Proportional to 209,118.69, 288,436.01 and 128,591.73

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Solution

The fourth proportional to 209,118.69, 288,436.01 and 128,591.73 is: 177,365.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,118.69 : 288,436.01 = 128,591.73 : x
  2. Step 2: Convert to fraction form
    209,118.69/288,436.01 = 128,591.73/x
  3. Step 3: Cross multiply
    209,118.69x = 288,436.01 × 128,591.73
  4. Step 4: Simplify right side
    209,118.69x = 37,090,484,877.24
  5. Step 5: Solve for x
    x = 37,090,484,877.24/209,118.69
  6. Step 6: Final answer
    x = 177,365.71

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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.