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Finding the Fourth Proportional to 70,955.43, 106,402.26 and 20,343.29

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Solution

The fourth proportional to 70,955.43, 106,402.26 and 20,343.29 is: 30,506.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,955.43 : 106,402.26 = 20,343.29 : x
  2. Step 2: Convert to fraction form
    70,955.43/106,402.26 = 20,343.29/x
  3. Step 3: Cross multiply
    70,955.43x = 106,402.26 × 20,343.29
  4. Step 4: Simplify right side
    70,955.43x = 2,164,571,910.56
  5. Step 5: Solve for x
    x = 2,164,571,910.56/70,955.43
  6. Step 6: Final answer
    x = 30,506.08

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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.