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Finding the Fourth Proportional to 86,856.84, 119,857.32 and 56,698.92

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Solution

The fourth proportional to 86,856.84, 119,857.32 and 56,698.92 is: 78,241.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,856.84 : 119,857.32 = 56,698.92 : x
  2. Step 2: Convert to fraction form
    86,856.84/119,857.32 = 56,698.92/x
  3. Step 3: Cross multiply
    86,856.84x = 119,857.32 × 56,698.92
  4. Step 4: Simplify right side
    86,856.84x = 6,795,780,598.09
  5. Step 5: Solve for x
    x = 6,795,780,598.09/86,856.84
  6. Step 6: Final answer
    x = 78,241.17

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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.