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Finding the Fourth Proportional to 86,671.84, 129,785.82 and 59,980.88

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Solution

The fourth proportional to 86,671.84, 129,785.82 and 59,980.88 is: 89,817.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,671.84 : 129,785.82 = 59,980.88 : x
  2. Step 2: Convert to fraction form
    86,671.84/129,785.82 = 59,980.88/x
  3. Step 3: Cross multiply
    86,671.84x = 129,785.82 × 59,980.88
  4. Step 4: Simplify right side
    86,671.84x = 7,784,667,695.12
  5. Step 5: Solve for x
    x = 7,784,667,695.12/86,671.84
  6. Step 6: Final answer
    x = 89,817.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.