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Finding the Fourth Proportional to 70,638.48, 97,481.52 and 38,806.56

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Solution

The fourth proportional to 70,638.48, 97,481.52 and 38,806.56 is: 53,553.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,638.48 : 97,481.52 = 38,806.56 : x
  2. Step 2: Convert to fraction form
    70,638.48/97,481.52 = 38,806.56/x
  3. Step 3: Cross multiply
    70,638.48x = 97,481.52 × 38,806.56
  4. Step 4: Simplify right side
    70,638.48x = 3,782,922,454.77
  5. Step 5: Solve for x
    x = 3,782,922,454.77/70,638.48
  6. Step 6: Final answer
    x = 53,553.28

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1.5x scale

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.