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Finding the Fourth Proportional to 86,798.32, 119,780.64 and 50,991.60

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Solution

The fourth proportional to 86,798.32, 119,780.64 and 50,991.60 is: 70,367.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,798.32 : 119,780.64 = 50,991.60 : x
  2. Step 2: Convert to fraction form
    86,798.32/119,780.64 = 50,991.60/x
  3. Step 3: Cross multiply
    86,798.32x = 119,780.64 × 50,991.60
  4. Step 4: Simplify right side
    86,798.32x = 6,107,806,482.62
  5. Step 5: Solve for x
    x = 6,107,806,482.62/86,798.32
  6. Step 6: Final answer
    x = 70,367.80

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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.