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Finding the Fourth Proportional to 235,685.27, 325,242.92 and 128,253.47

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Solution

The fourth proportional to 235,685.27, 325,242.92 and 128,253.47 is: 176,988.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,685.27 : 325,242.92 = 128,253.47 : x
  2. Step 2: Convert to fraction form
    235,685.27/325,242.92 = 128,253.47/x
  3. Step 3: Cross multiply
    235,685.27x = 325,242.92 × 128,253.47
  4. Step 4: Simplify right side
    235,685.27x = 41,713,530,815.45
  5. Step 5: Solve for x
    x = 41,713,530,815.45/235,685.27
  6. Step 6: Final answer
    x = 176,988.28

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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.