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Finding the Fourth Proportional to 45,871.29, 68,825.34 and 20,923.11

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Solution

The fourth proportional to 45,871.29, 68,825.34 and 20,923.11 is: 31,393.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,871.29 : 68,825.34 = 20,923.11 : x
  2. Step 2: Convert to fraction form
    45,871.29/68,825.34 = 20,923.11/x
  3. Step 3: Cross multiply
    45,871.29x = 68,825.34 × 20,923.11
  4. Step 4: Simplify right side
    45,871.29x = 1,440,040,159.61
  5. Step 5: Solve for x
    x = 1,440,040,159.61/45,871.29
  6. Step 6: Final answer
    x = 31,393.06

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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.