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Finding the Fourth Proportional to 70,136.45, 96,786.81 and 38,305.48

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Solution

The fourth proportional to 70,136.45, 96,786.81 and 38,305.48 is: 52,860.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,136.45 : 96,786.81 = 38,305.48 : x
  2. Step 2: Convert to fraction form
    70,136.45/96,786.81 = 38,305.48/x
  3. Step 3: Cross multiply
    70,136.45x = 96,786.81 × 38,305.48
  4. Step 4: Simplify right side
    70,136.45x = 3,707,464,972.75
  5. Step 5: Solve for x
    x = 3,707,464,972.75/70,136.45
  6. Step 6: Final answer
    x = 52,860.74

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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.