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Finding the Fourth Proportional to 86,785.82, 119,758.80 and 48,538.76

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Solution

The fourth proportional to 86,785.82, 119,758.80 and 48,538.76 is: 66,980.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,785.82 : 119,758.80 = 48,538.76 : x
  2. Step 2: Convert to fraction form
    86,785.82/119,758.80 = 48,538.76/x
  3. Step 3: Cross multiply
    86,785.82x = 119,758.80 × 48,538.76
  4. Step 4: Simplify right side
    86,785.82x = 5,812,943,234.31
  5. Step 5: Solve for x
    x = 5,812,943,234.31/86,785.82
  6. Step 6: Final answer
    x = 66,980.34

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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.