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Finding the Fourth Proportional to 84,604.82, 126,907.52 and 21,424.92

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Solution

The fourth proportional to 84,604.82, 126,907.52 and 21,424.92 is: 32,137.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,604.82 : 126,907.52 = 21,424.92 : x
  2. Step 2: Convert to fraction form
    84,604.82/126,907.52 = 21,424.92/x
  3. Step 3: Cross multiply
    84,604.82x = 126,907.52 × 21,424.92
  4. Step 4: Simplify right side
    84,604.82x = 2,718,982,880.37
  5. Step 5: Solve for x
    x = 2,718,982,880.37/84,604.82
  6. Step 6: Final answer
    x = 32,137.45

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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.