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Finding the Fourth Proportional to 154,793.75, 213,624.69 and 86,814.74

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Solution

The fourth proportional to 154,793.75, 213,624.69 and 86,814.74 is: 119,809.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,793.75 : 213,624.69 = 86,814.74 : x
  2. Step 2: Convert to fraction form
    154,793.75/213,624.69 = 86,814.74/x
  3. Step 3: Cross multiply
    154,793.75x = 213,624.69 × 86,814.74
  4. Step 4: Simplify right side
    154,793.75x = 18,545,770,851.81
  5. Step 5: Solve for x
    x = 18,545,770,851.81/154,793.75
  6. Step 6: Final answer
    x = 119,809.56

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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.