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Finding the Fourth Proportional to 223,666.37, 308,668.13 and 128,191.54

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Solution

The fourth proportional to 223,666.37, 308,668.13 and 128,191.54 is: 176,909.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,666.37 : 308,668.13 = 128,191.54 : x
  2. Step 2: Convert to fraction form
    223,666.37/308,668.13 = 128,191.54/x
  3. Step 3: Cross multiply
    223,666.37x = 308,668.13 × 128,191.54
  4. Step 4: Simplify right side
    223,666.37x = 39,568,642,001.71
  5. Step 5: Solve for x
    x = 39,568,642,001.71/223,666.37
  6. Step 6: Final answer
    x = 176,909.21

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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.