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Finding the Fourth Proportional to 55,687.80, 83,531.70 and 48,908.10

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Solution

The fourth proportional to 55,687.80, 83,531.70 and 48,908.10 is: 73,362.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,687.80 : 83,531.70 = 48,908.10 : x
  2. Step 2: Convert to fraction form
    55,687.80/83,531.70 = 48,908.10/x
  3. Step 3: Cross multiply
    55,687.80x = 83,531.70 × 48,908.10
  4. Step 4: Simplify right side
    55,687.80x = 4,085,376,736.77
  5. Step 5: Solve for x
    x = 4,085,376,736.77/55,687.80
  6. Step 6: Final answer
    x = 73,362.15

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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.