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Finding the Fourth Proportional to 154,644.87, 213,424.86 and 86,673.30

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Solution

The fourth proportional to 154,644.87, 213,424.86 and 86,673.30 is: 119,617.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,644.87 : 213,424.86 = 86,673.30 : x
  2. Step 2: Convert to fraction form
    154,644.87/213,424.86 = 86,673.30/x
  3. Step 3: Cross multiply
    154,644.87x = 213,424.86 × 86,673.30
  4. Step 4: Simplify right side
    154,644.87x = 18,498,236,918.24
  5. Step 5: Solve for x
    x = 18,498,236,918.24/154,644.87
  6. Step 6: Final answer
    x = 119,617.53

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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.