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Finding the Fourth Proportional to 68,638.24, 94,722.38 and 38,422.81

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Solution

The fourth proportional to 68,638.24, 94,722.38 and 38,422.81 is: 53,024.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,638.24 : 94,722.38 = 38,422.81 : x
  2. Step 2: Convert to fraction form
    68,638.24/94,722.38 = 38,422.81/x
  3. Step 3: Cross multiply
    68,638.24x = 94,722.38 × 38,422.81
  4. Step 4: Simplify right side
    68,638.24x = 3,639,500,009.49
  5. Step 5: Solve for x
    x = 3,639,500,009.49/68,638.24
  6. Step 6: Final answer
    x = 53,024.38

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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.