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Finding the Fourth Proportional to 240,443.16, 331,836.21 and 138,472.44

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Solution

The fourth proportional to 240,443.16, 331,836.21 and 138,472.44 is: 191,106.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    240,443.16 : 331,836.21 = 138,472.44 : x
  2. Step 2: Convert to fraction form
    240,443.16/331,836.21 = 138,472.44/x
  3. Step 3: Cross multiply
    240,443.16x = 331,836.21 × 138,472.44
  4. Step 4: Simplify right side
    240,443.16x = 45,950,169,679.05
  5. Step 5: Solve for x
    x = 45,950,169,679.05/240,443.16
  6. Step 6: Final answer
    x = 191,106.16

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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.