Home / 209,203.56-288,863.82-128,668.50

Finding the Fourth Proportional to 209,203.56, 288,863.82 and 128,668.50

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Solution

The fourth proportional to 209,203.56, 288,863.82 and 128,668.50 is: 177,662.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,203.56 : 288,863.82 = 128,668.50 : x
  2. Step 2: Convert to fraction form
    209,203.56/288,863.82 = 128,668.50/x
  3. Step 3: Cross multiply
    209,203.56x = 288,863.82 × 128,668.50
  4. Step 4: Simplify right side
    209,203.56x = 37,167,674,423.67
  5. Step 5: Solve for x
    x = 37,167,674,423.67/209,203.56
  6. Step 6: Final answer
    x = 177,662.72

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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.