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Finding the Fourth Proportional to 235,678.91, 325,236.30 and 128,248.92

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Solution

The fourth proportional to 235,678.91, 325,236.30 and 128,248.92 is: 176,983.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,678.91 : 325,236.30 = 128,248.92 : x
  2. Step 2: Convert to fraction form
    235,678.91/325,236.30 = 128,248.92/x
  3. Step 3: Cross multiply
    235,678.91x = 325,236.30 × 128,248.92
  4. Step 4: Simplify right side
    235,678.91x = 41,711,201,952.37
  5. Step 5: Solve for x
    x = 41,711,201,952.37/235,678.91
  6. Step 6: Final answer
    x = 176,983.18

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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.