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Finding the Fourth Proportional to 86,467.87, 128,842.23 and 77,035.41

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Solution

The fourth proportional to 86,467.87, 128,842.23 and 77,035.41 is: 114,787.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,467.87 : 128,842.23 = 77,035.41 : x
  2. Step 2: Convert to fraction form
    86,467.87/128,842.23 = 77,035.41/x
  3. Step 3: Cross multiply
    86,467.87x = 128,842.23 × 77,035.41
  4. Step 4: Simplify right side
    86,467.87x = 9,925,414,013.36
  5. Step 5: Solve for x
    x = 9,925,414,013.36/86,467.87
  6. Step 6: Final answer
    x = 114,787.31

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.