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Finding the Fourth Proportional to 70,954.48, 97,921.56 and 39,123.28

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Solution

The fourth proportional to 70,954.48, 97,921.56 and 39,123.28 is: 53,992.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,954.48 : 97,921.56 = 39,123.28 : x
  2. Step 2: Convert to fraction form
    70,954.48/97,921.56 = 39,123.28/x
  3. Step 3: Cross multiply
    70,954.48x = 97,921.56 × 39,123.28
  4. Step 4: Simplify right side
    70,954.48x = 3,831,012,609.92
  5. Step 5: Solve for x
    x = 3,831,012,609.92/70,954.48
  6. Step 6: Final answer
    x = 53,992.54

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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.