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Finding the Fourth Proportional to 90,700.65, 136,051.31 and 27,521.31

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Solution

The fourth proportional to 90,700.65, 136,051.31 and 27,521.31 is: 41,282.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,700.65 : 136,051.31 = 27,521.31 : x
  2. Step 2: Convert to fraction form
    90,700.65/136,051.31 = 27,521.31/x
  3. Step 3: Cross multiply
    90,700.65x = 136,051.31 × 27,521.31
  4. Step 4: Simplify right side
    90,700.65x = 3,744,310,140.81
  5. Step 5: Solve for x
    x = 3,744,310,140.81/90,700.65
  6. Step 6: Final answer
    x = 41,282.07

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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.