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Finding the Fourth Proportional to 70,786.62, 97,686 and 38,954.70

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Solution

The fourth proportional to 70,786.62, 97,686 and 38,954.70 is: 53,757.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,786.62 : 97,686 = 38,954.70 : x
  2. Step 2: Convert to fraction form
    70,786.62/97,686 = 38,954.70/x
  3. Step 3: Cross multiply
    70,786.62x = 97,686 × 38,954.70
  4. Step 4: Simplify right side
    70,786.62x = 3,805,328,824.20
  5. Step 5: Solve for x
    x = 3,805,328,824.20/70,786.62
  6. Step 6: Final answer
    x = 53,757.74

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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.