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Finding the Fourth Proportional to 70,122.80, 96,769.99 and 39,910.42

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Solution

The fourth proportional to 70,122.80, 96,769.99 and 39,910.42 is: 55,076.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,122.80 : 96,769.99 = 39,910.42 : x
  2. Step 2: Convert to fraction form
    70,122.80/96,769.99 = 39,910.42/x
  3. Step 3: Cross multiply
    70,122.80x = 96,769.99 × 39,910.42
  4. Step 4: Simplify right side
    70,122.80x = 3,862,130,944.30
  5. Step 5: Solve for x
    x = 3,862,130,944.30/70,122.80
  6. Step 6: Final answer
    x = 55,076.68

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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.