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Finding the Fourth Proportional to 86,808.91, 119,755.84 and 56,191.89

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Solution

The fourth proportional to 86,808.91, 119,755.84 and 56,191.89 is: 77,518.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,808.91 : 119,755.84 = 56,191.89 : x
  2. Step 2: Convert to fraction form
    86,808.91/119,755.84 = 56,191.89/x
  3. Step 3: Cross multiply
    86,808.91x = 119,755.84 × 56,191.89
  4. Step 4: Simplify right side
    86,808.91x = 6,729,306,988.14
  5. Step 5: Solve for x
    x = 6,729,306,988.14/86,808.91
  6. Step 6: Final answer
    x = 77,518.62

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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.