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Finding the Fourth Proportional to 70,753.76, 97,638.60 and 38,921.96

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Solution

The fourth proportional to 70,753.76, 97,638.60 and 38,921.96 is: 53,711.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,753.76 : 97,638.60 = 38,921.96 : x
  2. Step 2: Convert to fraction form
    70,753.76/97,638.60 = 38,921.96/x
  3. Step 3: Cross multiply
    70,753.76x = 97,638.60 × 38,921.96
  4. Step 4: Simplify right side
    70,753.76x = 3,800,285,683.66
  5. Step 5: Solve for x
    x = 3,800,285,683.66/70,753.76
  6. Step 6: Final answer
    x = 53,711.43

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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.