Home / 209,187.72-288,683.46-128,660.76

Finding the Fourth Proportional to 209,187.72, 288,683.46 and 128,660.76

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Solution

The fourth proportional to 209,187.72, 288,683.46 and 128,660.76 is: 177,554.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,187.72 : 288,683.46 = 128,660.76 : x
  2. Step 2: Convert to fraction form
    209,187.72/288,683.46 = 128,660.76/x
  3. Step 3: Cross multiply
    209,187.72x = 288,683.46 × 128,660.76
  4. Step 4: Simplify right side
    209,187.72x = 37,142,233,363.03
  5. Step 5: Solve for x
    x = 37,142,233,363.03/209,187.72
  6. Step 6: Final answer
    x = 177,554.56

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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.